[#5195] Be a little stricter in the accepted values
[#5195] Be a little stricter in the accepted values

lym/allura-git,apache/incubator-allura,heiths/allura,heiths/allura,lym/allura-git,lym/allura-git,apache/allura,lym/allura-git,apache/incubator-allura,apache/allura,heiths/allura,apache/incubator-allura,lym/allura-git,heiths/allura,apache/allura,heiths/allura,apache/allura,apache/incubator-allura,apache/allura