use gerrit credentials for cookiecutter generator repo

Change-Id: Ie4ec91e2c9141104c23d1a08aeb01e7b0fb0dfb2
diff --git a/jenkins/client/job/salt-models/generate.yml b/jenkins/client/job/salt-models/generate.yml
index 56a2da2..491cfee 100644
--- a/jenkins/client/job/salt-models/generate.yml
+++ b/jenkins/client/job/salt-models/generate.yml
@@ -23,7 +23,7 @@
                 default: "${_param:jenkins_gerrit_url}/mk/cookiecutter-templates.git"
               COOKIECUTTER_TEMPLATE_CREDENTIALS:
                 type: string
-                default: github-credentials
+                default: gerrit
               COOKIECUTTER_TEMPLATE_BRANCH:
                 type: string
                 default: master