title: gitlab-ci: exclude merge requests from specific branch
body: <p>I would like gitlab-ci to ignore merge from a specific branch.</p>
  <p>Example: I have 3 branches. <strong>master</strong>, <strong>development</strong> &amp; <strong>test</strong>.</p>
  <p>If I push the code directly or merge the code from any branch to master/development, the pipelines get executed.</p>
  <p>Now, I don't want pipeline to get running when I merge from <strong>test</strong> branch specifically.</p>
  <p>I would like to exclude merge from <strong>test</strong> branch to <strong>development</strong> or <strong>master</strong>.</p>