* fixed provider and identity so credentials aren't accidentally shared.
* defaulted OSProvider to OSValhallaProvider's region. ex_force_auth_url
  was overlooked previously.
* pep8 compliance changes.
	modified:   service/driver.py
	modified:   service/drivers/openstackNetworkManager.py
	modified:   service/identity.py
	modified:   service/meta.py
	modified:   service/provider.py
	modified:   service/size.py