Refactored all pipelines branches to external soft param

Change-Id: I3e451815029227f287aa1575099b0cd25b72433d
diff --git a/jenkins/client/job/deploy/openstack.yml b/jenkins/client/job/deploy/openstack.yml
index f316ab4..7fdda92 100644
--- a/jenkins/client/job/deploy/openstack.yml
+++ b/jenkins/client/job/deploy/openstack.yml
@@ -13,6 +13,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: cloud-deploy-pipeline.groovy
           param:
@@ -41,6 +42,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: openstack-compute-install.groovy
           param: