use the YAML style parameter passing instead of old style module calls

playbooks/roles/edxapp/tasks/service_variant_config.yml

-- name: "create {{ item }} application config"
-  template: >
-    src={{ item }}.env.json.j2
-    dest={{ edxapp_app_dir }}/{{ item }}.env.json
+---
+- name: create application and auth config
+  template:
+    src: "{{ item[0] }}.{{ item[1] }}.json.j2"
+    dest: "{{ edxapp_app_dir }}/{{ item[0] }}.{{ item[1] }}.json"
   sudo_user: "{{ edxapp_user }}"
-  with_items: service_variants_enabled
+  with_nested: 
+    - "{{ service_variants_enabled }}"
+    - [ 'env', 'auth' ]
   tags:
     - install
     - install:configuration
     - edxapp_cfg
 
-- name: "create {{ item }} auth file"
-  template: >
-    src={{ item }}.auth.json.j2
-    dest={{ edxapp_app_dir }}/{{ item }}.auth.json
+- name: create auth and application yaml config
+  template:
+    src: "{{ item[0] }}.{{ item[1] }}.yaml.j2"
+    dest: "{{ EDXAPP_CFG_DIR }}/{{ item[0] }}.{{ item[1] }}.yaml"
   sudo_user: "{{ edxapp_user }}"
-  with_items: service_variants_enabled
-  tags:
-    - install
-    - install:configuration
-    - edxapp_cfg
-
-- name: "create {{ item }} yaml application config"
-  template: >
-    src={{ item }}.env.yaml.j2
-    dest={{ EDXAPP_CFG_DIR }}/{{ item }}.env.yaml
-  sudo_user: "{{ edxapp_user }}"
-  with_items: service_variants_enabled
-  tags:
-    - install
-    - install:configuration
-    - edxapp_cfg
-
-- name: "create {{ item }} yaml auth file"
-  template: >
-    src={{ item }}.auth.yaml.j2
-    dest={{ EDXAPP_CFG_DIR }}/{{ item }}.auth.yaml
-  sudo_user: "{{ edxapp_user }}"
-  with_items: service_variants_enabled
+  with_nested:
+    - "{{ service_variants_enabled }}"
+    - [ 'env', 'auth' ]
   tags:
     - install
     - install:configuration
     - edxapp_cfg
 
 # write the supervisor scripts for the service variants
-
 - name: "writing {{ item }} supervisor script"
-  template: >
-    src={{ item }}.conf.j2 dest={{ supervisor_available_dir }}/{{ item }}.conf
-    owner={{ supervisor_user }}
-    group={{ supervisor_user }}
-  with_items: service_variants_enabled
+  template:
+    src: "{{ item }}.conf.j2"
+    dest: "{{ supervisor_available_dir }}/{{ item }}.conf"
+    owner: "{{ supervisor_user }}"
+    group: "{{ supervisor_user }}"
   sudo_user: "{{ supervisor_user }}"
+  with_items: "{{ service_variants_enabled }}"
   tags:
     - install
     - install:configuration
 
-- name: writing edxapp supervisor script
-  template: >
-    src=edxapp.conf.j2 dest={{ supervisor_available_dir }}/edxapp.conf
-    owner={{ supervisor_user }}
-    group={{ supervisor_user }}
+# write the supervisor script for edxapp and celery workers
+- name: writing edxapp and celery supervisor scripts
+  template:
+    src: "{{ item }}.j2"
+    dest: "{{ supervisor_available_dir }}/{{ item }}"
+    owner: "{{ supervisor_user }}"
+    group: "{{ supervisor_user }}"
   sudo_user: "{{ supervisor_user }}"
+  with_items:
+    - edxapp.conf
+    - workers.conf
   tags:
     - install
     - install:configuration
 
-- name: "add gunicorn configuration files"
-  template: >
-    src={{ item }}_gunicorn.py.j2 dest={{ edxapp_app_dir }}/{{ item }}_gunicorn.py
-  with_items: service_variants_enabled
+- name: add gunicorn configuration files
+  template:
+    src: "{{ item }}_gunicorn.py.j2"
+    dest: "{{ edxapp_app_dir }}/{{ item }}_gunicorn.py"
   sudo_user: "{{ edxapp_user }}"
-  tags:
-    - install
-    - install:configuration
-
-# write the supervisor script for celery workers
-
-- name: writing celery worker supervisor script
-  template: >
-    src=workers.conf.j2 dest={{ supervisor_available_dir }}/workers.conf
-    owner={{ supervisor_user }}
-    group={{ supervisor_user }}
-  sudo_user: "{{ supervisor_user }}"
+  with_items: "{{ service_variants_enabled }}"
   tags:
     - install
     - install:configuration
 
 # Enable the supervisor jobs
 - name: "enable {{ item }} supervisor script"
-  file: >
-    src={{ supervisor_available_dir }}/{{ item }}.conf
-    dest={{ supervisor_cfg_dir }}/{{ item }}.conf
-    state=link
-    force=yes
-  with_items: service_variants_enabled
-  when: celery_worker is not defined and not disable_edx_services
+  file:
+    src: "{{ supervisor_available_dir }}/{{ item }}.conf"
+    dest: "{{ supervisor_cfg_dir }}/{{ item }}.conf"
+    state: link
+    force: yes
   sudo_user: "{{ supervisor_user }}"
+  with_items: "{{ service_variants_enabled }}"
+  when: celery_worker is not defined and not disable_edx_services
   tags:
     - install
     - install:configuration
 
-- name: "enable edxapp supervisor script"
-  file: >
-    src={{ supervisor_available_dir }}/edxapp.conf
-    dest={{ supervisor_cfg_dir }}/edxapp.conf
-    state=link
-    force=yes
-  when: celery_worker is not defined and not disable_edx_services
+- name: enable edxapp supervisor script
+  file:
+    src: "{{ supervisor_available_dir }}/edxapp.conf"
+    dest: "{{ supervisor_cfg_dir }}/edxapp.conf"
+    state: link
+    force: yes
   sudo_user: "{{ supervisor_user }}"
+  when: celery_worker is not defined and not disable_edx_services
   tags:
     - install
     - install:configuration
 
-- name: "enable celery worker supervisor script"
-  file: >
-    src={{ supervisor_available_dir }}/workers.conf
-    dest={{ supervisor_cfg_dir }}/workers.conf
-    state=link
-    force=yes
-  when: celery_worker is defined and not disable_edx_services
+- name: enable celery worker supervisor script
+  file:
+    src: "{{ supervisor_available_dir }}/workers.conf"
+    dest: "{{ supervisor_cfg_dir }}/workers.conf"
+    state: link
+    force: yes
   sudo_user: "{{ supervisor_user }}"
+  when: celery_worker is defined and not disable_edx_services
   tags:
     - install
     - install:configuration
 
 - name: create helper scripts for managing edxapp
-  template: >
-    src=edx/bin/{{ item[0] }}-{{ item[1] }}.j2
-    dest={{ COMMON_BIN_DIR }}/{{ item[0] }}-{{ item[1] }}
-    owner={{ edxapp_user }}
-    mode=0755
+  template:
+    src: "edx/bin/{{ item[0] }}-{{ item[1] }}.j2"
+    dest: "{{ COMMON_BIN_DIR }}/{{ item[0] }}-{{ item[1] }}"
+    owner: "{{ edxapp_user }}"
+    mode: 0755
   with_nested:
-    - edxapp_helper_scripts
-    - service_variants_enabled
+    - "{{ edxapp_helper_scripts }}"
+    - "{{ service_variants_enabled }}"
   tags:
     - install
     - install:configuration
@@ -145,16 +122,15 @@
     DB_MIGRATION_USER: "{{ COMMON_MYSQL_MIGRATE_USER }}"
     DB_MIGRATION_PASS: "{{ COMMON_MYSQL_MIGRATE_PASS }}"
     EDX_PLATFORM_SETTINGS_OVERRIDE: "aws_migrate"
-  with_items: service_variants_enabled
+  with_items: "{{ service_variants_enabled }}"
   tags:
     - migrate
 
 # Gather assets using paver if possible
-
-- name: gather {{ item }} static assets with paver
+- name: "gather {{ item }} static assets with paver"
   command: "{{ COMMON_BIN_DIR }}/edxapp-update-assets-{{ item }}"
   when: celery_worker is not defined and not devstack and item != "lms-preview"
-  with_items: service_variants_enabled
+  with_items: "{{ service_variants_enabled }}"
   tags:
     - gather_static_assets
     - assets