title: Prestodb CLI mysql connector can't find databases with underscore in their name
body: <p>for example: </p>
  
  <pre><code>show tables from mysql.records_1;
  </code></pre>
  
  <p>returns:</p>
  
  <pre><code> Table 
   -------
  (0 rows)
  
  Query 20151119_162735_00058_hja7s, FINISHED, 1 node
  Splits: 2 total, 2 done (100.00%)
  0:00 [0 rows, 0B] [0 rows/s, 0B/s]
  </code></pre>
  
  <p>Although records_1 exists and there are tables in it.</p>
  
  <p>when running on databases without an underscore results are ok.</p>
  
  <p>anyone encountered this issue? any resolution?</p>