Add relative option to puppet-lint

  - This is to avoid issue cause by the fact that
  - foloder name is differemnt from module name
  - see rodjek/puppet-lint#252

Rakefile

@@ -2,6 +2,7 @@ require 'rubygems'
 require 'puppetlabs_spec_helper/rake_tasks'
 require 'puppet-lint/tasks/puppet-lint'
 PuppetLint.configuration.send('disable_80chars')
+PuppetLint.configuration.relative = true
 PuppetLint.configuration.ignore_paths = ["spec/**/*.pp", "pkg/**/*.pp"]
 
 desc "Run puppet in noop mode and check for syntax errors."