Fix MySQL credentials in provisioning script

Author: jamiesnape

provisioning/ansible/roles/mysql/tasks/main.yml

@@ -55,7 +55,7 @@
     - midas_test
 
 - name: mysql user
-  mysql_user: user={{ ansible_env.SUDO_USER }} password={{ ansible_env.SUDO_USER }} priv={{ item }}.*:ALL state=present
+  mysql_user: user=vagrant password=vagrant priv={{ item }}.*:ALL state=present
   with_items:
     - midas
     - midas_test