Remove endless sleep from aiohttp, run until complete cancelled tasks

src/prozorro_sale/metrics/__init__.py

@@ -38,8 +38,6 @@ class AioAppWrapper:
         await self.runner.setup()
         site = web.TCPSite(self.runner, '0.0.0.0', self.port)
         await site.start()
-        while True:
-            await asyncio.sleep(3600)
 
     def shutdown(self):
         LOG.info('Shutdown aiohttp app')
@@ -95,11 +93,14 @@ class ApplicationWrapper:
     def run_all(self):
         self.handle_signal(signal.SIGTERM, _raise_graceful_exit)
         self.handle_signal(signal.SIGHUP, _raise_graceful_exit)
+        tasks = asyncio.gather(*[app.initialize() for app in self.apps])
         try:
             LOG.info('Start serving')
-            self.loop.run_until_complete(asyncio.gather(*[app.initialize() for app in self.apps]))
+            self.loop.run_until_complete(tasks)
         except KeyboardInterrupt:
             pass
         finally:
             for app in self.apps:
                 app.shutdown()
+            self.loop.run_until_complete(tasks)
+            print('Stopping main wrapper')