Fix puppet-lint warnings

* WARNING: indentation of => is not properly aligned
* WARNING: string containing only a variable
* WARNING: variable not enclosed in {}
* WARNING: double quoted string containing no variables
* WARNING: unquoted file mode
* WARNING: mode should be represented as a 4 digit octal value or symbolic mode
* WARNING: ensure found on line but it's not the first attribute
* WARNING: class not documented
* WARNING: defined type not documented

Change-Id: Id820dbab5abaa4318b9e78a6cf9081f2df0103f4
Closes-Bug: 1364702