title: Blocking JIRA status transition when review is not finished or not created
body: <p>Is it possible to block <strong>JIRA</strong> status transition (for instance from 'In Progress' to 'Resolved'),
  when there exists not empty changeset for this issue and if this changeset is not fully reviewed in Crucible - what means that not all <strong>Crucible</strong> reviews are closed?</p>
  
  <p>Don't block otherwise.</p>