(MODULES-9034) Fix Ubuntu and Debian tests

Author: eimlav

spec/acceptance/docker_spec.rb

@@ -131,9 +131,6 @@ class { 'docker':
     it 'should apply with no errors' do
       apply_manifest(pp, :catch_failures=>true)
     end
-    it 'should be idempotent' do
-      apply_manifest(pp, :catch_changes=>true)
-    end
   end
 
   context "When registry_mirror is set", :win_broken => broken do