Ease puppet filetypes for Hash values to conform with puppet-lint

[benedikt-haug]

Dear mvisonneau,

I would like to ease the puppet value types for hash values to be able to comply with the puppet style guide and puppet-lint.

The changes should not change anything for any current users.

These two checks are tiggering for me:
http://puppet-lint.com/checks/only_variable_string/
http://puppet-lint.com/checks/quoted_booleans/

Example:
Currently booleans need to be quoted:

          ignore_empty_list => 'true',

Thank you!

[mvisonneau]

cool, LGTM, thanks @gna58 !