v2 replication has been merged in cinder, but there is no way to call
the api methods. This patch allows the following methods to be called
in order to fully support v2 replication:
- os-enable_replication
- os-disable_replication
- os-list_replication_targets
- os-failover_replication
Change-Id: Ic3cf082916bdf089de05eebce456dff8cdc11f7c
Implements: blueprint replication-v2