adding AIX support for Issue #137

[thomascate]

Description

Adding AIX support to the Push Jobs Cookbook.

Issues Resolved

https://github.com/chef-cookbooks/push-jobs/issues/137

Check List

• [ ] All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
• [ ] New functionality includes testing.
• [ ] New functionality has been documented in the README if applicable
• [ ] All commits have been signed for the Developer Certificate of Origin. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/CONTRIBUTING.MD