Make the autoupdate_flag a string to avoid this bug:
```
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Failed to parse template rvm/rvmrc.erb:
  Filepath: /srv/puppet/forge/rvm/templates/rvmrc.erb
  Line: 7
  Detail: undefined method `empty?' for 0:Fixnum
```
Merge pull request #41 from huasome/maestrodev

Make the autoupdate_flag a string to avoid this bug: