(PE-40535) try newer litmus

Author: davidmalloncares

Gemfile

@@ -41,7 +41,7 @@ group :development do
   gem "orchestrator_client", '< 0.7.1',          require: false
 end
 group :system_tests do
-  gem "puppet_litmus", '~> 1.0', require: false, platforms: [:ruby, :x64_mingw]
+  gem "puppet_litmus", '~> 1.6', require: false, platforms: [:ruby, :x64_mingw]
   gem "serverspec", '~> 2.41',   require: false
 end
 group :release_prep do