title: mk-heartbeat issue in mysql replication setup
body: <p>I am facing problem in setting mysql replication monitoring using mk-heartbeat.</p>
  
  <pre><code>DBI connect('Heartbeat;host=10.160.251.223;mysql_read_default_group=client','heartbeat',...) failed: Access denied for user 'heartbeat'@'%' to database 'Heartbeat' at /EBSroot/maatkit/mk-heartbeat line 2056
  </code></pre>
  
  <p>I have created a user heartbeat that has no permissions.</p>