Removing cmp from ec2_vpc_net.py to be compatible with Python3 (#21202)

* Removing cmp to be compatible with Python3

* fix syntax

* Added an overlooked return

* Fixing making  things overly complicated

* Simplifying since tags will always be hashable. Don't need to use cmp at all.

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

@@ -150,7 +150,7 @@ def update_vpc_tags(vpc, module, vpc_obj, tags, name):
     tags.update({'Name': name})
     try:
         current_tags = dict((t.name, t.value) for t in vpc.get_all_tags(filters={'resource-id': vpc_obj.id}))
-        if cmp(tags, current_tags):
+        if tags != current_tags:
             if not module.check_mode:
                 vpc.create_tags(vpc_obj.id, tags)
             return True