add back the deleted parameter in the configuration group tests
add back the deleted parameter in the configuration group tests

with the parameter deleted we can not rerun the tests on the same
instance without clearing the datstore_configuration_paramters
table and reloading the params. This will readd the parameter
that is deleted.

Change-Id: Ic1cdfa416a14c42b6c4323612ec609915224b6ee
Closes-Bug: #1379083

zhujzhuo/openstack-trove,redhat-openstack/trove,hplustree/trove,fabian4/trove,mmasaki/trove,cp16net/trove,redhat-openstack/trove,cp16net/trove,openstack/trove,openstack/trove,fabian4/trove,fabian4/trove,hplustree/trove,zhujzhuo/openstack-trove,redhat-openstack/trove,mmasaki/trove,cp16net/trove,zhangg/trove,mmasaki/trove,zhangg/trove,zhujzhuo/openstack-trove