Hotfix update issue with memory store

See merge request !304

controller/northbound/server/auth_test.go

@@ -620,6 +620,7 @@ func TestAuth_UpdateRoles(t *testing.T) {
 }
 
 func TestAuth_DeletePermissionsForRole(t *testing.T) {
+	clearAndCreateAuthTestSetup()
 	type args struct {
 		ctx     context.Context
 		request *apb.DeletePermissionsForRoleRequest

controller/nucleus/memoryDeviceStore.go

@@ -49,8 +49,8 @@ func (t *MemoryDeviceStore) Add(item device.Device) error {
 // Update updates a existing device.
 func (t *MemoryDeviceStore) Update(item device.Device) error {
 	_, ok := t.Store[item.ID().String()]
-	if ok {
-		return nil
+	if !ok {
+		return errors.ErrCouldNotFind{StoreName: deviceStoreName}
 	}
 
 	var device device.LoadedDevice

controller/rbac/memoryRoleStore.go

@@ -55,8 +55,8 @@ func (s *MemoryRoleStore) Delete(item rbac.Role) error {
 // Update updates an existing role.
 func (s *MemoryRoleStore) Update(item rbac.Role) error {
 	_, ok := s.Store[item.ID().String()]
-	if ok {
-		return nil
+	if !ok {
+		return errors.ErrCouldNotFind{StoreName: roleStoreName}
 	}
 
 	var role rbac.LoadedRole

controller/rbac/memoryUserStore.go

@@ -55,8 +55,8 @@ func (s *MemoryUserStore) Delete(item rbac.User) error {
 // Update updates an existing user.
 func (s *MemoryUserStore) Update(item rbac.User) error {
 	_, ok := s.Store[item.ID().String()]
-	if ok {
-		return nil
+	if !ok {
+		return errors.ErrCouldNotFind{StoreName: userStoreName}
 	}
 
 	var user rbac.LoadedUser