In LBaaS legacy mode we use the exclusive router edge as platform for
neutron LBaaS.
The following patch addresses two issues in this mode:
- In the legacy code, LBaaS driver maintained a DFW section which allows
traffic between the LB and its members. This code wasn't added when we
added the legacy mode.
- The original code had a bug which failed to cleanup these DFW rules when
a pool or members were deleted. The patch adds an admin utility which
cleans up such stale DFW rules.
Change-Id: I1c95ec6292e6cf50641581a65cbb4bdf8942aa8f