Add CentOS7 support to the utility playbook
Add CentOS7 support to the utility playbook

This change adds the git package and the yum install task to
allow the utility playbook to be executed against a CentOS7
OS.

Change-Id: Ie7545edf8d30e6a2018658e478a899afa2c043bb
Signed-off-by: Kevin Carter <ffb54fded2f22052678e45d78b58d223654eb6fa@rackspace.com>

cloudnull/os-ansible-deployment,stackforge/os-ansible-deployment,bunchc/openstack-ansible,weezer/openstack-ansible,os-cloud/os-ansible-deployment,cfarquhar/openstack-ansible,yanyao/newton,robb-romans/openstack-ansible,bunchc/openstack-ansible,Logan2211/openstack-ansible,robb-romans/openstack-ansible,Logan2211/openstack-ansible,openstack/openstack-ansible,stackforge/os-ansible-deployment,os-cloud/os-ansible-deployment,BjoernT/openstack-ansible,yanyao/openstack-ansible,yanyao/newton,BjoernT/os-ansible-deployment,yanyao/openstack-ansible,BjoernT/os-ansible-deployment,BjoernT/openstack-ansible,cloudnull/os-ansible-deployment,weezer/openstack-ansible,openstack/openstack-ansible,cfarquhar/openstack-ansible,BjoernT/os-ansible-deployment