[fix] Printing application stdout and stderr correctly (with tangling of cmd log on stderr.)

bin/cmd

@@ -118,13 +118,17 @@ class CommandLineInterface(object):
             assert msg.type in ['stdout', 'stderr', 'exit', 'process_exit']
 
             if msg.type == 'stdout':
-                logger.info("container msg: %r", msg)
+                logger.debug("container msg: %r", msg)
                 if msg.payload == 'eof':
                     outeof = True
+                else:
+                    print(msg.payload)
             elif msg.type == 'stderr':
-                logger.info("container msg: %r", msg)
+                logger.debug("container msg: %r", msg)
                 if msg.payload == 'eof':
                     erreof = True
+                else:
+                    print(msg.payload, file=sys.stderr)
             elif msg.type == 'process_exit':
                 logger.info("process ended: %r", msg)
                 state = 'exiting'