Enable postgres on drone again

* use proper password

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

.drone.yml

@@ -622,9 +622,9 @@ matrix:
     - DB: mysql
       PHP: 5.6
       ENABLE_REDIS: true
-#    - DB: postgres
-#      PHP: 5.6
-#      ENABLE_REDIS: true
+    - DB: postgres
+      PHP: 5.6
+      ENABLE_REDIS: true
     - DB: mysqlmb4
       PHP: 5.6
       ENABLE_REDIS: true
@@ -644,7 +644,7 @@ services:
     image: postgres
     environment:
       - POSTGRES_USER=oc_autotest
-      - POSTGRES_PASSWORD=oc_autotest
+      - POSTGRES_PASSWORD=owncloud
     when:
       matrix:
         DB: postgres