Add support for Trove Replication

Added initial support for replication.
Changed launch dialog to have an Advanced tab where
you can select a master instance for replication
Display replication information in details view
Added support for Detach

Change-Id: I2c90d5be0f47c07fe9049a685fbf7a36a2585e0e
Implements: blueprint trove-replication-v1-support

Conflicts:
	openstack_dashboard/dashboards/project/databases/templates/databases/_detail_overview.html
	openstack_dashboard/dashboards/project/databases/tests.py
	requirements.txt