MODULES-1520 add test to assert it does not break

spec/acceptance/types/mysql_user_spec.rb

@@ -52,4 +52,14 @@ describe 'mysql_user' do
       end
     end
   end
+  context 'using resource should throw no errors' do
+    describe 'find users' do
+      it {
+        on default, puppet('resource mysql_user'), {:catch_failures => true} do |r|
+          expect(r.stdout).to_not match(/Error:/)
+          expect(r.stdout).to_not match(/must be properly quoted, invalid character:/)
+        end
+      }
+    end
+  end
 end