Functional tests use OS_CLOUD environment variable
Functional tests use OS_CLOUD environment variable

Have the functional tests possibly run off the old OS_CLOUD
environment variable.

Change-Id: I8f23a8e6b335b72ebf693652239c4f75f950f593

dtroyer/python-openstacksdk,dudymas/python-openstacksdk,openstack/python-openstacksdk,briancurtin/python-openstacksdk,briancurtin/python-openstacksdk,stackforge/python-openstacksdk,dudymas/python-openstacksdk,dtroyer/python-openstacksdk,mtougeron/python-openstacksdk,openstack/python-openstacksdk,mtougeron/python-openstacksdk,stackforge/python-openstacksdk