Don't pass mysql root password in plaintext in commands

## Changes 
- Creates a /root/.my.cnf file with user/password information to connect to mysql client without specifying password.  This file is obviously readable only by the root user
- Changes mysql commands to not user the "-p" flag so root password is not insecurely exposed

See: [mysql docs](https://dev.mysql.com/doc/refman/5.5/en/password-security-user.html) for more information about password security