title: error on starting grafana service
body: <p>I have grafana 4.4.3 on an ubuntu 16.4 LTS which is installed on an vm and its IP is 1.2.3.4 . 
  I also have a mysql database version 5.0.95 on a CentOS 5.9 and its ip is 5.5.5.5 and mydatabase name is : voip</p>
  
  <p>I want to set mysql as backend for grafana. I'v changed my grafana.ini file like this:</p>
  
  <pre><code>###[database]###    
  type = mysql
  host = 5.5.5.5:3306
  name = voip
  user = root
  password = t@123
  ###[session]###
  provider: mysql
  provider_config = `root:t@123@tcp(5.5.5.5:3306)/voip`
  </code></pre>
  
  <p>I also set my root account to be used as a remote account. </p>
  
  <p>when I want to start grafana-server service, it gives me this error:</p>
  
  <pre><code>Fail to initialize orm engine" logger=sqlstore error="Sqlstore::Migration 
  failed err: this user requires old password authentication. If you still 
  want to use it, please add 'allowOldPasswords=1' to your DSN. See also 
  https://github.com/go-sql-driver/mysql/wiki/old_passwords\n"
  </code></pre>
  
  <p>what should I do? Did I don anything wrong?</p>