Parametrize mk-pipelines and pipeline-library repos in gerrit mirror downstream

Change-Id: Ib9d9b11c57172c980085622dc7f35bd8edd04cde
diff --git a/jenkins/client/job/git-mirrors/downstream/pipelines.yml b/jenkins/client/job/git-mirrors/downstream/pipelines.yml
index 7bf366c..271a725 100644
--- a/jenkins/client/job/git-mirrors/downstream/pipelines.yml
+++ b/jenkins/client/job/git-mirrors/downstream/pipelines.yml
@@ -2,12 +2,14 @@
   - system.jenkins.client.job.git-mirrors.downstream
 parameters:
   _param:
+    gerrit_pipeline_library_repo: https://github.com/Mirantis/pipeline-library
+    gerrit_mk_pipelines_repo: https://github.com/Mirantis/mk-pipelines
     jenkins_git_mirror_downstream_jobs:
       - name: pipeline-library
         downstream: mcp-ci/pipeline-library
-        upstream: "https://github.com/Mirantis/pipeline-library"
+        upstream: "${_param:gerrit_pipeline_library_repo}"
         branches: master
       - name: mk-pipelines
         downstream: mk/mk-pipelines
-        upstream: "https://github.com/Mirantis/mk-pipelines"
+        upstream: "${_param:gerrit_mk_pipelines_repo}"
         branches: master