Document return values for ec2_vpc_net.py (#21294)

* Document return values for ec2_vpc_net.py

* Prepend "vpc" to return values

lib/ansible/modules/cloud/amazon/ec2_vpc_net.py

@@ -100,6 +100,49 @@ EXAMPLES = '''
 
 '''
 
+RETURN = '''
+vpc.id:
+    description: VPC resource id
+    returned: success
+    type: string
+    sample: vpc-b883b2c4
+vpc.cidr_block:
+    description: The CIDR of the VPC
+    returned: success
+    type: string
+    sample: "10.0.0.0/16"
+vpc.state:
+    description: state of the VPC
+    returned: success
+    type: string
+    sample: available
+vpc.tags:
+    description: tags attached to the VPC, includes name
+    returned: success
+    type: dict
+    sample: {"Name": "My VPC", "env": "staging"}
+vpc.classic_link_enabled:
+    description: indicates whether ClassicLink is enabled
+    returned: success
+    type: boolean
+    sample: false
+vpc.dhcp_options_id:
+    description: the id of the DHCP options assocaited with this VPC
+    returned: success
+    type: string
+    sample: dopt-67236184
+vpc.instance_tenancy:
+    description: indicates whther VPC uses default or dedicated tenancy
+    returned: success
+    type: string
+    sample: default
+vpc.is_default:
+    description: indicates whether this is the default VPC
+    returned: success
+    type: boolean
+    sample: false
+'''
+
 try:
     import boto
     import boto.ec2