Tempest: Fixing L3 agent hosting router for DVR setup

The tests for L3 agent hosting routers were failing in DVR setup
because the code was trying to add router to l3 agent when it was
already there.

Closes-bug: #1590049

Change-Id: I0087ad6f6df662579d557ab790de64e04ff22943
1 file changed
tree: ecd568e82273a0512d381b8272f3fe29af8fb211
  1. neutron/