Configure the lo interface in the amphora-haproxy namespace.
It fixes issues with the synchronization of haproxy peer/stick tables
when updating a load balancer configuration.
Story 2009005
Task 42682
Change-Id: I15997acaf12258ec483286dad676efdea8963611
(cherry picked from commit 4443596e29)
(cherry picked from commit 9ba1182579)
(cherry picked from commit 74c0ff2a40)
(cherry picked from commit e84d947876)