support/scripts/pkg-stats: add a timeout on HTTP requests for upstream URLs

Some upstream sites are very slow to respond, and the default timeout
of 300 seconds of the aiohttp.ClientSession() is too long. Let's
reduce it to 15 seconds.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 387c496b98895a3ad38d53554d45713a81d7a169)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

support/scripts/pkg-stats

@@ -440,7 +440,8 @@ async def check_url_status(session, pkg, npkgs, retry=True):
 async def check_package_urls(packages):
     tasks = []
     connector = aiohttp.TCPConnector(limit_per_host=5)
-    async with aiohttp.ClientSession(connector=connector, trust_env=True) as sess:
+    async with aiohttp.ClientSession(connector=connector, trust_env=True,
+                                     timeout=aiohttp.ClientTimeout(total=15)) as sess:
         packages = [p for p in packages if p.status['url'][0] == 'ok']
         for pkg in packages:
             tasks.append(asyncio.ensure_future(check_url_status(sess, pkg, len(packages))))