SQL Database backup won't work if password has > symbol

Created by: sashkab

I've run into issue after upgrade to GitLab 5.1 (7214a30df76cbe2b439346fd615006b2bdd5f88f). I had long password which included symbol > for gitlab user in mysql. After upgrade to 5.1 I've started getting errors during daily backup processes:

Dumping database ...  
sh: 1: cannot create : Directory nonexistent
 done 

It looks that when mysqldump called from lib/backup/database.rb line 48?, password isn't included into quotes.