Fix for bug 1360700,
fixing the openstack package version and adding exact version as dependency in contrail-openstack-config and contrail-openstack packages.
Moving contrail-fabric-utils to common/rpm from third_party
Fix bug 1362354 - contrail-config should be dependent on python-lxml >= 2.3.2
Removing epoc string from horixon and contrail-horizon plugin packages.

Change-Id: I676f4aaa3871dde8d6fe16ee84a5e69086d3545d