Fix the /etc/kolla copy path

the path of globals.yml should be `/etc/kolla/globals`, not be
`/etc/kolla/kolla/globals`

Change-Id: I49d91c4dab13b197402844ac74f87b5dd2adbfca

doc/source/user/quickstart.rst

@@ -199,7 +199,8 @@ Install Kolla for development
 
    .. code-block:: console
 
-      cp -r kolla-ansible/etc/kolla /etc/kolla
+      mkdir -p /etc/kolla
+      cp -r kolla-ansible/etc/kolla/* /etc/kolla
 
    .. end