be more flexible in mimetypes during test validation
be more flexible in mimetypes during test validation

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