add hook to loginform test

Author: raclim

Diff for: client/modules/User/components/LoginForm.unit.test.jsx

@@ -23,6 +23,10 @@ jest.mock('../actions', () => ({
   )
 }));
 
+jest.mock('../../../common/useSyncFormTranslations', () => ({
+  useSyncFormTranslations: jest.fn()
+}));
+
 const subject = () => {
   reduxRender(<LoginForm />, {
     store