Fix redis-cluster support on drone

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

.drone.yml

@@ -591,7 +591,6 @@ pipeline:
   memcache-redis-cluster:
     image: nextcloudci/php7.0:php7.0-13
     commands:
-      - sleep 10
       - ./autotest.sh sqlite tests/lib/Memcache/RedisTest.php
       - wget https://codecov.io/bash -O codecov.sh
       - sh -c "if [ '$DRONE_BUILD_EVENT' = 'pull_request' ]; then bash codecov.sh -B $DRONE_BRANCH -C $DRONE_COMMIT -P $DRONE_PULL_REQUEST -t 117641e2-a9e8-4b7b-984b-ae872d9b05f5 -f tests/autotest-clover-sqlite.xml; fi"
@@ -704,8 +703,8 @@ matrix:
     - TESTS: sqlite-php7.0-samba-native
     - TESTS: sqlite-php7.0-samba-non-native
     - TEST: memcache-memcached
-#    - TEST: memcache-redis-cluster
-#      ENABLE_REDIS_CLUSTER: true
+    - TEST: memcache-redis-cluster
+      ENABLE_REDIS_CLUSTER: true
     - TESTS: sqlite-php7.0-webdav-apache
       ENABLE_REDIS: true
 
@@ -716,7 +715,7 @@ services:
       matrix:
        ENABLE_REDIS: true
   cache-cluster:
-    image: grokzen/redis-cluster
+    image: morrisjobke/redis-cluster
     when:
       matrix:
        ENABLE_REDIS_CLUSTER: true