Fixes broken group specs on MySQL

:nested_groups clause was added to failing specs

ee/spec/requests/groups_controller_spec.rb

@@ -91,7 +91,7 @@ describe GroupsController, type: :request do
         end
       end
 
-      context 'subgroup' do
+      context 'subgroup', :nested_groups do
         let(:group) { create(:group, :nested) }
 
         it 'does not create ip restriction' do

ee/spec/views/groups/edit.html.haml_spec.rb

@@ -33,7 +33,7 @@ describe 'groups/edit.html.haml' do
       end
     end
 
-    context 'subgroup' do
+    context 'subgroup', :nested_groups do
       let(:group) { create(:group, :nested) }
 
       before do