title: Not getting milliseconds in MySQL when inserting from Sails
body: <p>I'm using <code>MySQL 5.7.13</code> with <code>sails 0.12.3</code> and <code>sails-mysql 0.12.2</code>. I want to insert a new record with a <code>timestamp</code> field which, in <code>beforeCreate</code> for that model, logs as value for the field the following: </p>
  
  <blockquote>
    <p>2016-07-13T16:37:21.529Z</p>
  </blockquote>
  
  <p>The definition of the field for the model is type <code>datetime</code>. It seems that the field is in correct format (ISO) but when I check the record directly from mysql command line I get always 000 in the milliseconds part, e.g. </p>
  
  <blockquote>
    <p>2016-07-13T16:37:21.000</p>
  </blockquote>
  
  <p>After checking and searching, I cannot find where the problem is. Any clue?</p>