Replace kolla title with kolla-ansible

This is mainly kolla-ansible installation part

Change-Id: Iab14884cfc037bc3cb8055db487c53aa14da070f

doc/source/user/quickstart.rst

@@ -109,11 +109,11 @@ configuration file ``/etc/ansible/ansible.cfg``:
     pipelining=True
     forks=100
 
-Install Kolla
-~~~~~~~~~~~~~
+Install Kolla-ansible
+~~~~~~~~~~~~~~~~~~~~~
 
-Install Kolla for deployment or evaluation
-------------------------------------------
+Install Kolla-ansible for deployment or evaluation
+--------------------------------------------------
 
 Install kolla-ansible and its dependencies using ``pip``.