These replication v2.1 APIs are not enforced by the
cinder policy.json file. This patch adds policy and
the code to support applying this policy action.
"volume:failover_host": "rule:admin_api",
"volume:freeze_host": "rule:admin_api",
"volume:thaw_host": "rule:admin_api",
Also these methods create a completely new context
instead of doing context.elevated(). It's better
to preserve the information that already there.
Change-Id: Ib577e902cda634ae2bd813edd9e39e022f23fde1
Closes-Bug: #1578722
01c6f681f9