Improve autostart logging

gns3server/compute/vmware/__init__.py

@@ -361,7 +361,7 @@ class VMware(BaseManager):
     def execute(self, subcommand, args, timeout=120, log_level=logging.INFO):
         trial = 2
 
-        while trial:
+        while True:
             try:
                 return (yield from self._execute(subcommand, args, timeout=timeout, log_level=log_level))
             except VMwareError as e:

gns3server/controller/gns3vm/__init__.py

@@ -240,6 +240,7 @@ class GNS3VM:
                                                         name="GNS3 VM ({})".format(self.current_engine().vmname),
                                                         host=None,
                                                         force=True)
+                log.error("Can't start the GNS3 VM: {}", str(e))
 
     @asyncio.coroutine
     def exit_vm(self):