(wip) adding package_source support to new constructs

[vinyar]

Description

Adding package_source pass-through to chef-server, supermarket, backend, and automate resources. This will pass package_source to the chef_ingredient resource, allowing installation of components in an off-public-facing-internet environment.

Issues Resolved

#171
Not included: chef-client and wf_builder

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

[wrightp]

Closing old PR. A new PR would need to be submitted.