Added a way to override having the aws role be installed. In cases where a local…

Added a way to override having the aws role be installed. In cases where a local host is being used, aws role is not needed. Default remains true though.

playbooks/edx-east/edxapp.yml

@@ -7,7 +7,8 @@
     CLUSTER_NAME: 'edxapp'
   serial: "{{ serial_count }}"
   roles:
-   - aws
+   - role: aws
+     when: COMMON_ENABLE_AWS_ROLE
    - role: automated
      AUTOMATED_USERS: "{{ EDXAPP_AUTOMATED_USERS | default({}) }}"
    - role: nginx

playbooks/roles/common_vars/defaults/main.yml

@@ -207,3 +207,5 @@ COMMON_TRACKING_LOG_ROTATION:
 # COMMON_USING_SECURE_REPO: true
 COMMON_EXTRA_CONFIGURATION_SOURCES_CHECKING: false
 COMMON_EXTRA_CONFIGURATION_SOURCES: []
+
+COMMON_ENABLE_AWS_ROLE: true