when store.Status was not initialized it caused
crashes when assigning store.Status.Info["endpoint"]
to objContext.Endpoint.
This commits makes sure store.Status is not Nil
before setting objContext.Endpoint and
objContext.SecureEndpoint in the ObjectStoreUser
controller.
Closes: https://github.com/rook/rook/issues/6916
Signed-off-by: Ali Maredia <amaredia@redhat.com>