Tempest for revert-to-snapshot

Added tempest testcases for revert-to-snapshot feature.

Depends-On: 16518c3b293561a2e9f4fa42a5247345ebd1e2b3
Change-Id: I97a9241ce53b144c30bc16d65dc8cf6e3f679743
3 files changed
tree: 129ce1480d1b48e709c1fcc9f02168feb63d9d86
  1. cinder/