Add default git params to test-mk-pipelines job

Change-Id: I693e7610ce2509ad624b370cc22348dd6525f01e
diff --git a/jenkins/client/job/test_pipelines.yml b/jenkins/client/job/test_pipelines.yml
index b418626..5d58f20 100644
--- a/jenkins/client/job/test_pipelines.yml
+++ b/jenkins/client/job/test_pipelines.yml
@@ -41,3 +41,10 @@
             GRADLE_CMD:
               type: string
               default: "check"
+            DEFAULT_GIT_URL:
+                type: string
+                description: "Run against alternate system reclass"
+                default: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            DEFAULT_GIT_REF:
+                type: string
+                default: master