1. What is the problem?
the smoke test can not pass, because the new
neutron qos code forbid duplicate rule create.
2. What is the solution to the problem?
adds additional check of such duplicated rules.
3. What the features to be implemented in the Tricircle to realize the solution?
No new features.
Change-Id: I7d208aeb6926877b944e114e2c714986ea46c683