Fix when qemu exit by itself clean other processes

Fix https://github.com/GNS3/gns3-gui/issues/1898

gns3server/compute/base_node.py

@@ -533,7 +533,7 @@ class BaseNode:
 
         server_config = self._manager.config.get_section_config("Server")
         server_host = server_config.get("host")
-        if not self._ubridge_hypervisor:
+        if not self.ubridge:
             self._ubridge_hypervisor = Hypervisor(self._project, self.ubridge_path, self.working_dir, server_host)
         log.info("Starting new uBridge hypervisor {}:{}".format(self._ubridge_hypervisor.host, self._ubridge_hypervisor.port))
         yield from self._ubridge_hypervisor.start()

gns3server/compute/qemu/qemu_vm.py

@@ -934,6 +934,7 @@ class QemuVM(BaseNode):
         except OSError as e:
             raise QemuError("Could not start QEMU console {}\n".format(e))
 
+    @asyncio.coroutine
     def _termination_callback(self, returncode):
         """
         Called when the process has stopped.
@@ -943,9 +944,7 @@ class QemuVM(BaseNode):
 
         if self.started:
             log.info("QEMU process has stopped, return code: %d", returncode)
-            self.status = "stopped"
-            self._hw_virtualization = False
-            self._process = None
+            yield from self.stop()
             # A return code of 1 seem fine on Windows
             if returncode != 0 and (returncode != 1 or not sys.platform.startswith("win")):
                 self.project.emit("log.error", {"message": "QEMU process has stopped, return code: {}\n{}".format(returncode, self.read_stdout())})