message: Use FederatedLearning-v0 environment in autofl.agent
diff: +import gym
  from absl import logging
  +from ..flenv import register_gym_env
  +
  def main(_):
  - logging.info("Starting to train FedML Agent")
  + logging.set_verbosity(logging.DEBUG)
  +
  + register_gym_env()
  + env = gym.make("FederatedLearning-v0")
  + print("action_space: {}".format(env.action_space))
  + print("observation_space: {}".format(env.observation_space))
  