cancel button is missing in security group's add rule modal

[Masco]

In security group's add rule modal, cancel button is missing.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/207800

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/207800
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=e8187b941df7c7a1e794426a84151878e813bd31
Submitter: Jenkins
Branch: master

commit e8187b941df7c7a1e794426a84151878e813bd31
Author: Masco Kaliyamoorthy <email address hidden>
Date: Fri Jul 31 15:15:34 2015 +0530

    Added cancel button in add rule modal

    Cancel button is missing in security group's add rule modal.

    This patch adding the cancel button in the ad rule modal.

    Change-Id: I66114ef5037bbdba11425c0e6bd34ef56280aa03
    Closes-Bug: #1480204