Ensure userLimits is nil

This can cause test pollution with other suites that do not expect to
set user limits, and consequently don't prepare the fake HTTP client to
respond to user limit creation.

Author: Zerpet

controllers/user_controller_test.go

@@ -199,6 +199,11 @@ var _ = Describe("UserController", func() {
 		})
 
 		Context("user limits", func() {
+			AfterEach(func() {
+				userLimits.Connections = nil
+				userLimits.Channels = nil
+			})
+
 			When("the user has limits defined", func() {
 				BeforeEach(func() {
 					userName = "test-user-limits"