Modify the description in README.rst
Modify the description in README.rst

In kolla repo now, There is only kolla-build.conf in etc directory

Change-Id: I5536133a68b62e0f56ca5a4eb49dc76c3964fb8c

intel-onp/kolla,stackforge/kolla,GalenMa/kolla,rahulunair/kolla,mrangana/kolla,stackforge/kolla,stackforge/kolla,coolsvap/kolla,openstack/kolla,nihilifer/kolla,intel-onp/kolla,mrangana/kolla,coolsvap/kolla,rahulunair/kolla,coolsvap/kolla,nihilifer/kolla,openstack/kolla,GalenMa/kolla