Add to jenkins gerrit credentials with password

Change-Id: I870ae13f346111e234859688efb66f671ebcd83c
Related-prod: PROD-31174
diff --git a/jenkins/client/job/ceph/add-node.yml b/jenkins/client/job/ceph/add-node.yml
index 763b859..00e50c5 100644
--- a/jenkins/client/job/ceph/add-node.yml
+++ b/jenkins/client/job/ceph/add-node.yml
@@ -13,7 +13,7 @@
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
             branch: "${_param:jenkins_pipelines_branch}"
-            credentials: "gerrit"
+            credentials: ${_param:jenkins_gerrit_credentials}
             script: ceph-add-node.groovy
           param:
             # general parameters