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>