Move volume-type-access methods to volume v2

volume-type-access API exist in volume v2 API according to
http://developer.openstack.org/api-ref-blockstorage-v2.html#os-volume-type-access-v2
However the v1 API doesn't contain it.
So base_types_client is not a good place to keep the corresponding
methods.

Change-Id: I976a876f93431db52c95343ab02ab53e91c68a50
2 files changed