Update the sources-branch-updater
Update the sources-branch-updater

This implements the following changes:

- Remove the workaround for the Ironic repo name mismatch.

- Use the branch/topic 'sha-update' when updating the
  files/templates in each role repository.

Change-Id: I7f2b74fa21df8f1f18a3a1dbfc7a5d716083cf63

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