Service available group already exists.Therefore we don't need to register this group here again. Change-Id: I570cb7c1d2e13318a102b9f01a85fd24ffb89f9a Closes-Bug: #1621036
Skip tests if Mistral service in not installed when running tempest. Change-Id: Ic51afda598f9e8fdb63937f7aa55deb6cea65285 Closes-Bug: #1592748