New API call to get details of supported QoS rule type

This commit adds new API call that allows to discover
details about supported QoS rule type and its parameters
by each of loaded backend drivers.

DocImpact: New call to get details about supported
           rule_type for each loaded backend driver
ApiImpact

Change-Id: I2008e9d3e400dd717434fbdd2e693c9c5e34c3a4
Closes-Bug: #1686035
2 files changed
tree: ab41a8f3a960b55d2bb4321cfc6889025f6df166
  1. neutron/