Merge pull request #670 from ticosax/set-exit-code-on-error

In case of error when starting sanic

sanic/app.py

@@ -574,6 +574,7 @@ class Sanic:
         except:
             log.exception(
                 'Experienced exception while trying to serve')
+            raise
         finally:
             self.is_running = False
         log.info("Server Stopped")

sanic/server.py

@@ -522,5 +522,3 @@ def serve_multiple(server_settings, workers):
     for process in processes:
         process.terminate()
     server_settings.get('sock').close()
-
-    asyncio.get_event_loop().stop()