Remove createfromenv test environment dependency
Remove createfromenv test environment dependency

The createfromenv deployment function uses the environment variable
OS_REGION_NAME, but the tests did not correctly mock this variable.
Consequently setting this env var before running tests would cause the
tests to fail. This patch corrects the mock.

Change-Id: I15fe174cd9700ff34791c6980fa52ff975055e02
Closes-Bug: #1308029

openstack/rally,shdowofdeath/rally,openstack/rally,eayunstack/rally,varunarya10/rally,cernops/rally,varunarya10/rally,vganapath/rally,vganapath/rally,cernops/rally,openstack/rally,go-bears/rally,eayunstack/rally,pandeyop/rally,vganapath/rally,gluke77/rally,yeming233/rally,yeming233/rally,pyKun/rally,eonpatapon/rally,group-policy/rally,pandeyop/rally,go-bears/rally,amit0701/rally,aplanas/rally,vponomaryov/rally,gluke77/rally,vefimova/rally,afaheem88/rally,redhat-openstack/rally,group-policy/rally,aforalee/RRally,amit0701/rally,vponomaryov/rally,vefimova/rally,redhat-openstack/rally,paboldin/rally,gluke77/rally,shdowofdeath/rally,openstack/rally,eonpatapon/rally,aforalee/RRally,paboldin/rally,gluke77/rally,pyKun/rally,eayunstack/rally,group-policy/rally,aplanas/rally,vganapath/rally,paboldin/rally,afaheem88/rally,amit0701/rally