Add switch to enable/disable data gathering from ec2 instances This i…

…s needed in some deployments were S3 is being used for file storage but the appserver is in another cloud provider, such as OpenStack.

This issues started happening after the ec2_facts role was replaced with 
the new version `ec2_metadata_facts` that fails when the server is not 
on AWS, unlike its older counterpart.

playbooks/roles/aws/tasks/main.yml

@@ -27,6 +27,7 @@
 - name: Gather ec2 facts for use in other roles
   action: ec2_metadata_facts
   no_log: True
+  when: COMMON_TAG_EC2_INSTANCE
   tags:
     - deploy
 

playbooks/roles/common_vars/defaults/main.yml

@@ -98,6 +98,13 @@ COMMON_ENABLE_NEWRELIC_INFRASTRUCTURE: False
 # as well
 COMMON_ENABLE_NEWRELIC_APP: False
 COMMON_ENABLE_MINOS: False
+# The COMMON_TAG_EC2_INSTANCE switch is used to enable/disable data gathering
+# from ec2 instances.
+# This is needed in some deployments were S3 is being used for file storage but
+# the appserver is in another cloud provider, such as OpenStack.
+# This issues started happening after the ec2_facts role was replaced with
+# the new version `ec2_metadata_facts` that fails when the server is not
+# on AWS, unlike its older counterpart
 COMMON_TAG_EC2_INSTANCE: False
 common_boto_version: '2.48.0'
 common_node_version: '8.9.3'