Fix issues with puppet gem removal of default_env

Since this is now changed to `DEFAULT_ENV`, we now create the old
function alias to retain functionality.

Bug: #796
Upstream: https://github.com/puppetlabs/puppet/blob/94df3c1a3992d89b2d7d5db8a70373c135bdd86b/lib/puppet/util.rb

CHANGELOG.md

@@ -2,6 +2,10 @@
 All notable changes to this project will be documented in this file. This
 project adheres to [Semantic Versioning](http://semver.org/).
 
+## Unreleased
+### Fixed
+ * Fix issues with puppet gem removal of `default_env` #796
+
 ## [2.7.8]
 
 ### Fixed

lib/rspec-puppet/monkey_patches.rb

@@ -132,6 +132,16 @@ def find_manifests_in_modules(pattern, environment)
   end
 
   module Util
+    # Fix for removal of default_env function
+    # Bug: https://github.com/rodjek/rspec-puppet/issues/796
+    # Upstream: https://github.com/puppetlabs/puppet/commit/94df3c1a3992d89b2d7d5db8a70373c135bdd86b
+    if !respond_to?(:default_env)
+      def default_env()
+        DEFAULT_ENV
+      end
+      module_function :default_env
+    end
+
     if respond_to?(:get_env)
       alias :old_get_env :get_env
       module_function :old_get_env