fix(helmfile): Support PostgreSQL as alternative database backend for Nextcloud and XWiki. **Note:** PostgreSQL is likely to become the preferred option/default in the future and MariaDB might be deprecated at a later point.

.gitlab-ci.yml

@@ -186,6 +186,9 @@ variables:
     description: "A new deployment sometimes needs a few minutes to sort itself. If tested too early tests may fail.
                   GRACE_PERIOD is the period in seconds that should be waited before running the tests."
     value: "0"
+  TESTS_NUMBER_OF_THREADS:
+    description: "How many threads are used for executing the tests in parallel?"
+    value: "8"
 
 # Declare .environments which is in `opendesk-env` repository. In case it is not available
 # 'cache' is used because job as a dummy key, as the job is not allowed to be empty.
@@ -560,7 +563,8 @@ run-tests:
           \"screenshot_redirect_step\": \"yes\", \
           \"testset\": \"${TESTS_TESTSET}\", \
           \"testprofile\": \"Namespace\", \
-          \"GRACE_PERIOD\": \"${TESTS_GRACE_PERIOD}\" \
+          \"GRACE_PERIOD\": \"${TESTS_GRACE_PERIOD}\", \
+          \"NUMBER_OF_THREADS\": \"${TESTS_NUMBER_OF_THREADS}\" \
         } \
       }" \
       "https://${TESTS_PROJECT_URL}/trigger/pipeline"