Fix the issue with defining FTP log depot.

The method connect_ftp has been deleted when some of the logic have been moved from LogFile into FileDepot and its subclasses. 
Consequently the FTP log depot validation failed.

https://bugzilla.redhat.com/show_bug.cgi?id=1151173
This format of keeping the opening `{` next to the first key always looked terrible to me.  You don't have to change it, I just find that other format so ugly.

To me, this is infinitely clearer:
```ruby
update_authentication(
  {
    :default => {
      :userid   => hsh[:username],
      :password => hsh[:password]
    }
  },
  :save => save
)
```