Set in tests non default cred for openstack

For some tests set non default tenant user pwd
in cluster attributes to check regullary if deployment
and ostf pass. For some tests leave default
value to check regullary that deployment and ostf pass
to with default data

Change-Id: I3512b6974ecd85582177e015336a89bf632402ba
Closes-Bug: #1321963
Merge "Set in tests non default cred for openstack"