Previously, when the attributes of a GCE firewall change, they were ignored. This PR changes that behavior and now updates them.
Note that the "update" also removes attributes that are not specified.
An overview of the firewall rule behavior is as follows:
1. firewall name in GCP, state=absent in PLAYBOOK: Delete from GCP
2. firewall name in PLAYBOOK, not in GCP: Add to GCP.
3. firewall name in GCP, name not in PLAYBOOK: No change.
4. firewall names exist in both GCP and PLAYBOOK, attributes differ: Update GCP to match attributes from PLAYBOOK.
* Fix docs to specify when python2.6+ is required (due to a library
dep). This helps us know when it is okay to use python2.6+ syntax in
the file.
* remove BabyJson returns. See #1211 This commit fixes all but the
openstack modules.
* Use if __name__ == '__main__' to only run the main part of the module
if the module is run as a program. This allows for the potential to
unittest the code later.
