Neutron API now supports getting details of supported
QoS rule type.
This patch adds support for this feature to OpenStack client.
Change-Id: I74d16563ce2236a7c899f5994f1dab43ace02138
Depends-On: I448b5d4f8e4ef42eafe50d9d6c63d0be666f98fc
Related-Bug: #1686035