Various Puppet lint fixes

* Fix following warnings:
    * double quoted string containing no variables
    * indentation of => is not properly aligned
    * quoted boolean value found
    * variable not enclosed in {}
* Fix following errors:
    * two-space soft tabs not used
* Remove quotes around class in include/require statements
* Remove some comments from the code, they added no value

Change-Id: I341b37f2c6795951f3285037b2fa612d767a4474