Test: use assert_has_calls() instead
Test: use assert_has_calls() instead

Some of the assertions in cinder test are sequential, should better
use assert_has_calls() instead of assert_any_call().
And assert_has_calls() provide more clear messages in case of failure.

Change-Id: I66d74d1b84f939eb02d00c6f84813beb7e7311e4

NetApp/cinder,j-griffith/cinder,phenoxim/cinder,eharney/cinder,mahak/cinder,bswartz/cinder,cloudbase/cinder,Nexenta/cinder,openstack/cinder,Nexenta/cinder,j-griffith/cinder,Datera/cinder,Datera/cinder,phenoxim/cinder,NetApp/cinder,cloudbase/cinder,Hybrid-Cloud/cinder,bswartz/cinder,ge0rgi/cinder,eharney/cinder,openstack/cinder,Hybrid-Cloud/cinder,mahak/cinder