Installing nodeenv for discovery role

The nodeenv dependency is now installed by the Ansible play, rather than relying on the library being in the code base's requirements. This will allow us to better separate the installation of Python and Node/Bower dependencies.

ECOM-6590

playbooks/roles/discovery/tasks/main.yml

@@ -56,6 +56,26 @@
     - install
     - install:system-requirements
 
+- name: install nodenv
+  pip:
+    name: "nodeenv"
+    version: "1.1.0"
+    # NOTE (CCB): Using the "virtualenv" option here doesn't seem to work.
+    executable: "{{ discovery_venv_dir }}/bin/pip"
+  become_user: "{{ discovery_user }}"
+  tags:
+    - install
+    - install:system-requirements
+
+- name: create nodeenv
+  shell: "{{ discovery_venv_dir }}/bin/nodeenv {{ discovery_nodeenv_dir }} --node={{ discovery_node_version }} --prebuilt"
+  args:
+    creates: "{{ discovery_nodeenv_dir }}"
+  become_user: "{{ discovery_user }}"
+  tags:
+    - install
+    - install:system-requirements
+
 - name: install application requirements
   command: make production-requirements
   args:
@@ -76,15 +96,6 @@
     - devstack
     - devstack:install
 
-- name: create nodeenv
-  shell: "{{ discovery_venv_dir }}/bin/nodeenv {{ discovery_nodeenv_dir }} --node={{ discovery_node_version }} --prebuilt"
-  args:
-    creates: "{{ discovery_nodeenv_dir }}"
-  become_user: "{{ discovery_user }}"
-  tags:
-    - install
-    - install:app-requirements
-
 - name: install node dependencies
   npm: executable={{ discovery_nodeenv_bin }}/npm path={{ discovery_code_dir }} production=yes
   become_user: "{{ discovery_user }}"