Remove replaces tag from the contrail-openstack-control
to allow contrail-dns package to brign in new upstart and
supervisor ini files.

Change-Id: Ie68966336dd3965ffef9a2f03539caca1338ee0d
Closes-Bug: 1398264
Merge "Remove replaces tag from the contrail-openstack-control to allow contrail-dns package to brign in new upstart and supervisor ini files." into R2.0