Improve vmware vmrun error error message

gns3server/compute/vmware/__init__.py

@@ -389,12 +389,12 @@ def _execute(self, subcommand, args, timeout=120, log_level=logging.INFO):
         try:
             stdout_data, _ = yield from asyncio.wait_for(process.communicate(), timeout=timeout)
         except asyncio.TimeoutError:
-            raise VMwareError("vmrun has timed out after {} seconds!\nTry to run {} in a terminal to see more informations.".format(timeout, command_string))
+            raise VMwareError("vmrun has timed out after {} seconds!\nTry to run {} in a terminal to see more informations.\nAnd make sure GNS3 and VMware run under the same user.".format(timeout, command_string))
 
         if process.returncode:
             # vmrun print errors on stdout
             vmrun_error = stdout_data.decode("utf-8", errors="ignore")
-            raise VMwareError("vmrun has returned an error: {}\nTry to run {} in a terminal to see more informations.".format(vmrun_error, command_string))
+            raise VMwareError("vmrun has returned an error: {}\nTry to run {} in a terminal to see more informations.\nAnd make sure GNS3 and VMware run under the same user.".format(vmrun_error, command_string))
 
         return stdout_data.decode("utf-8", errors="ignore").splitlines()