fix bug of checking the startup of log_server (#355)

* fix bug of checking the startup of log_server

* add notification

* add notification

* fix rarfile error in python2

.teamcity/requirements.txt

 # requirements for unittest
+rarfile==3.1
 paddlepaddle-gpu==1.6.1.post97
 gym
 details

parl/remote/scripts.py

@@ -88,7 +88,9 @@ def is_log_server_started(ip_address, port):
                 started = True
                 break
         except:
-            time.sleep(3)
+            pass
+        time.sleep(3)
+        click.echo("Checking status of log_server...")
     return started