'Submit photos for verification.
Keyword Arguments:
face_image (str): The base-64 encoded face image data.
photo_id_image (str): The base-64 encoded ID image data.
full_name (unicode): The full name of the user, if the user is changing it.
expected_status_code (int): The expected response status code.
Returns:
HttpResponse'

def _submit_photos(self, face_image=None, photo_id_image=None, full_name=None, expected_status_code=200):

    url = reverse('verify_student_submit_photos')
    params = {}
    if (face_image is not None):
        params['face_image'] = face_image
    if (photo_id_image is not None):
        params['photo_id_image'] = photo_id_image
    if (full_name is not None):
        params['full_name'] = full_name
    response = self.client.post(url, params)
    self.assertEqual(response.status_code, expected_status_code)
    return response
