Move job queue to redis

We'll use it as cache in the future.

/!\ You'll loose your old jobs (pending jobs too) so upgrade only when
you don't have pending job anymore.

scripts/clean/server/test.sh

@@ -6,4 +6,5 @@ for i in $(seq 1 6); do
   rm -f "./config/local-test.json"
   rm -f "./config/local-test-$i.json"
   createdb "peertube_test$i"
+  redis-cli KEYS "q-localhost:900$i*" | grep -v empty | xargs --no-run-if-empty redis-cli DEL
 done