change unnecessary closure into plain function

asab/web/container.py

@@ -137,17 +137,6 @@ def __init__(self, websvc: WebService, config_section_name: str, config: typing.
 			preflight_paths = re.split(r"[,\s]+", preflight_str, re.MULTILINE)
 			self.add_preflight_handlers(preflight_paths)
 
-		@aiohttp.web.middleware
-		async def set_request_context(request: aiohttp.web.Request, handler):
-			"""
-			Make sure that the incoming aiohttp.web.Request is available via Request context variable
-			"""
-			request_ctx = Request.set(request)
-			try:
-				return await handler(request)
-			finally:
-				Request.reset(request_ctx)
-
 		self.WebApp.middlewares.append(set_request_context)
 
 
@@ -227,3 +216,15 @@ def get_ports(self) -> typing.List[str]:
 		for addr, port, ssl_context in self._listen:
 			ports.append(port)
 		return ports
+
+
+@aiohttp.web.middleware
+async def set_request_context(request: aiohttp.web.Request, handler):
+	"""
+	Make sure that the incoming aiohttp.web.Request is available via Request context variable
+	"""
+	request_ctx = Request.set(request)
+	try:
+		return await handler(request)
+	finally:
+		Request.reset(request_ctx)