Following commit provides:
- possibility of using postgres as database backend
- possibility of using ORM mapping in monasca:
- API
- Thresh
- Notification
Additionally:
- different approach of providing configuration settings
- removed unused winchester schema
- reworked execution phases of the plugin:
-- installing dependencies in the beginning
Implements: blueprint postgres-cli-support
Change-Id: Iae561b0c7e6b90cc7c9f5b122c0e4b37bc5ef843
161ad011d1