Refactored all pipelines branches to external soft param

Change-Id: I3e451815029227f287aa1575099b0cd25b72433d
diff --git a/jenkins/client/job/salt-formulas/git-mirrors/2way.yml b/jenkins/client/job/salt-formulas/git-mirrors/2way.yml
index 688bbed..c00c707 100644
--- a/jenkins/client/job/salt-formulas/git-mirrors/2way.yml
+++ b/jenkins/client/job/salt-formulas/git-mirrors/2way.yml
@@ -242,6 +242,7 @@
             scm:
               type: git
               url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+              branch: "${_param:jenkins_pipelines_branch}"
               credentials: "gerrit"
               script: git-mirror-2way-pipeline.groovy
               github:
@@ -275,6 +276,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: git-mirror-2way-pipeline.groovy
             github:
@@ -307,6 +309,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: git-mirror-2way-pipeline.groovy
             github:
diff --git a/jenkins/client/job/salt-formulas/release.yml b/jenkins/client/job/salt-formulas/release.yml
index c686e6e..fe6df5e 100644
--- a/jenkins/client/job/salt-formulas/release.yml
+++ b/jenkins/client/job/salt-formulas/release.yml
@@ -8,6 +8,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: release-salt-formulas-pipeline.groovy
             github:
diff --git a/jenkins/client/job/salt-formulas/tests.yml b/jenkins/client/job/salt-formulas/tests.yml
index 44fd4c1..6333e6e 100644
--- a/jenkins/client/job/salt-formulas/tests.yml
+++ b/jenkins/client/job/salt-formulas/tests.yml
@@ -132,6 +132,7 @@
             scm:
               type: git
               url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+              branch: "${_param:jenkins_pipelines_branch}"
               credentials: "gerrit"
               script: test-salt-formulas-pipeline.groovy
             trigger:
@@ -179,6 +180,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: test-salt-formulas-env.groovy
           param: