Functionalize some PBCore generation, add stub PBCore for access variants.
Merge pull request #3 from jordandukart/7.x

7.x
Add callback to create access copies, to be called from Microservices.
Pass the required parameters. (derp)
Add the XACML policy of the mezzanine to the access copy, if present.
Merge pull request #23 from adam-vessey/7.x-microservices-callback

Add in callback used from Microservices.