python-swiftclient stopped supporting the temp url structure used when radosgw
was set as the endpoint_type in ocata, meaning only Newton and older versions
of python-swiftclient will work. Newton is deprecated, so remove the option.
This breaks the deprecation cycle, but since it has been not working for so
long it needs to just be dropped.
Change-Id: Ibdc93b049b7e1ae34cac9e1f599786439c46a685
e9e4d8870c