Removing duplicate repo_build role dependency
Removing duplicate repo_build role dependency

Alpha-sorting the required roles by name to help
avoid such mistakes moving forward.

Change-Id: I5be3a4b04ca3091ab2a3a32fce3990e569a0065a

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