Add env_id to log messages while uploading

examples/agents/random_agent.py

@@ -18,6 +18,10 @@ if __name__ == '__main__':
     logger = logging.getLogger()
     logger.setLevel(logging.INFO)
 
+    outdir = '/tmp/random-agent-results'
+    gym.upload(outdir, algorithm_id='random')
+    raise"hi"
+
     env = gym.make('CartPole-v0')
     agent = RandomAgent(env.action_space)