puppet-lint protoproxy

This change makes protoproxy.pp pass puppet-lint check. That is a
prelimary before converting the manifest to a module and roles.

* use spaces for indentation
* add trailing comma
* replace trailing semicolons with trailing commas
* double quotes to single quotes
* double quoted string containing no variables
* align some arrows
* remove trailing whitespaces
* unquoted resource title
* use one file {} statement per file

Change-Id: Icc475dc6b44981f390999092daefcf87d4a7cdc3
Merge "puppet-lint protoproxy" into production