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
Removing epoc string from horixon and contrail-horizon plugin packages

Closes-Bug-R2.0: 1360700

Change-Id: I2a5e84f5765f35795e80319832bac7eab22ebd5f