Underline should match the title length in docs

According to the openstack contributer guide, the underlines
in an rst file should be of the same length as that of the
heading text to follow rst formatting conventions.
http://docs.openstack.org/contributor-guide/rst-conv/titles.html



Change-Id: I186abdfd87bc1e26fb822412b7335b1c42c25b25
Signed-off-by: Asha Saravanamohan <assarava@cisco.com>

doc/CONTRIBUTING.rst

@@ -30,7 +30,7 @@ Basics
 .. _here: https://wiki.openstack.org/wiki/GitCommitMessages
 
 Development Environment
-========================
+=======================
 
 #. Please follow our `quickstart`_ to deploy your environment and test your
   changes.

doc/kibana-guide.rst

@@ -35,7 +35,7 @@ Note: This step is necessary until the default Kibana dashboard is implemented
 in Kolla.
 
 Search logs - Discover tab
-===========================
+==========================
 
 Logs search is available under Discover tab. In the menu on the left side,
 one can choose any field that will be included in a new search. To do this,
@@ -85,7 +85,7 @@ If a Dashboard has already been saved, it can be opened by choosing *open
 dashboard* option in the menu on the right.
 
 Exporting and importing created items - Settings tab
-=====================================================
+====================================================
 
 Once visualizations, searches or dashboards are created, they can be exported
 to a json format by choosing Settings tab and then Objects tab. Each of the

doc/quickstart.rst

@@ -321,7 +321,7 @@ For more information refer to
 `_bug 1562334 <https://bugs.launchpad.net/kolla/+bug/1562334>`__.
 
 Building Container Images
-==========================
+=========================
 
 The Kolla community builds and pushes tested images for each tagged release of
 Kolla, but if running from master, it is recommended to build images locally.
@@ -441,7 +441,7 @@ the local registry is operating on IP address 192.168.1.100 and the port 4000.
 
 For *all-in-one* deploys, the following commands can be run. These will
 setup all of the containers on the localhost. These commands will be
-wrapped in the kolla-script in the future. 
+wrapped in the kolla-script in the future.
 
 .. note:: even for all-in-one installs it is possible to use the docker
    registry for deployment, although not strictly required.
@@ -512,7 +512,7 @@ available by entering IP address or hostname from ``kolla_external_fqdn``, or
 default to ``kolla_internal_vip_address``.
 
 Useful tools
--------------
+------------
 After successful deployment of OpenStack, run the following command can create
 an openrc file ``/etc/kolla/admin-openrc.sh`` on the deploy node. Or view
 ``tools/openrc-example`` for an example of an openrc that may be used with the