Added branch creation to yaql ACL
Added branch creation to yaql ACL

To comply with the new governance for libraries yaql has to define
stable branches.
This patch allows yaql-release team to create new stable branches and
yaql-milestone team to maintain them.

Change-Id: If15ab12ffabe035b676fb46dabe46531689244ab

openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config,coolsvap/project-config,anbangr/osci-project-config,coolsvap/project-config,dongwenjuan/project-config,citrix-openstack/project-config,noorul/os-project-config,citrix-openstack/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,anbangr/osci-project-config,noorul/os-project-config