Clean-up python-pcs
Clean-up python-pcs

In order to avoid conflicts with Packet Construction Set which is by
default in Ubuntu mirrors, package was renamed to pcs

It should be merged after https://review.openstack.org/#/c/164109/

Note: python-pcs should be also removed manually from build repository
as it was placed there manually just not to break CI


Change-Id: Ib6a8349df3b52c80ce59daf43727db819d808087
Implements: support-ubuntu-trusty
Signed-off-by: Sergii Golovatiuk <98168b9e97e341cddc0074e7bec42876c0bd6617@mirantis.com>
AnselZhangGit/fuel-main,dancn/fuel-main-dev,dancn/fuel-main-dev,AnselZhangGit/fuel-main,SergK/fuel-main,dancn/fuel-main-dev,SmartInfrastructures/fuel-main-dev,SmartInfrastructures/fuel-main-dev,ddepaoli3/fuel-main-dev,stackforge/fuel-main,SmartInfrastructures/fuel-main-dev,teselkin/fuel-main,ddepaoli3/fuel-main-dev,huntxu/fuel-main,Fiware/ops.Fuel-main-dev,AnselZhangGit/fuel-main,SergK/fuel-main,eayunstack/fuel-main,Fiware/ops.Fuel-main-dev,huntxu/fuel-main,ddepaoli3/fuel-main-dev,SmartInfrastructures/fuel-main-dev,AnselZhangGit/fuel-main,dancn/fuel-main-dev,SergK/fuel-main,teselkin/fuel-main,stackforge/fuel-main,teselkin/fuel-main,eayunstack/fuel-main,teselkin/fuel-main,Fiware/ops.Fuel-main-dev,stackforge/fuel-main,Fiware/ops.Fuel-main-dev,ddepaoli3/fuel-main-dev,huntxu/fuel-main,eayunstack/fuel-main