* templates are now stored in the database.
* evaluator is reloaded whenever a template is added/removed.
* supporting all types of templates (standard, equivalence, definition)
* new cli commands:
- vitrage template add
- vitrage template delete
Change-Id: I58abf5e034662206bd6919493c95c450c0ecdf9c
Depends-On: I07741ed100b9eb70b303567706b659d10a34b156
Implements: blueprint crud-templates