title: Sails.js (waterline mysql) global migrate property
body: <p>I want to know if this is possible to set the "<strong>migrate</strong>" property globally for all sails (waterline) models?</p>
  
  <p>Directly in concrete model I able to do it so:</p>
  
  <pre><code>module.exports = {
      schema: true,
      migrate: 'safe',   // &lt;-- safe, drop or alter
      autoCreatedAt: true,
      autoUpdatedAt: true,
      autoPK: true,
      attributes: {
        ...
      }
  }
  </code></pre>
  
  <p>But I wondering is there a way to switch the migrate mode globally in app (for all models. I have read the docs, and google it, but didn't found the answer on my question.</p>
  
  <p>Thanks a lot in advance!</p>