Add tempest test for l3-ha extension

Add missing l3-ha extension under neutron tempest tests.

Change-Id: Ia608d3f5d63a88eefa4e61da6df2f3656c8446a0
Closes-Bug: #1684065
3 files changed
tree: 1eaf696f329b659037f7d5f357e2d7522e0beae7
  1. neutron/