Description of problem:

Add an internal versioning system to OSP director. 



Additional info:

Reproducible OSP director configuration relies on many properly formatted text files. (JSON, YAML, Heat templates, etc.) Getting all of the files right is a time consuming and error prone process. Small changes in file syntax between releases complicates matters.

We already have many validators to ensure the files are properly formatted. We should add a facility for saving and version control on the undercloud. The same facility to integrate with an external versioning system.