bitbake: tests/runqueue: Ensure hashserv exits before deleting files

We've seen races where the socket may be gone but the server is still writing
out it's database. Handle that case too to avoid cleanup tracebacks.

[YOCTO #14440]

(Bitbake rev: b9e4fb843cb9d3a4d4404af093a781fab5520465)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/tests/runqueue.py

@@ -361,7 +361,7 @@ class RunQueueTests(unittest.TestCase):
 
     def shutdown(self, tempdir):
         # Wait for the hashserve socket to disappear else we'll see races with the tempdir cleanup
-        while os.path.exists(tempdir + "/hashserve.sock"):
+        while (os.path.exists(tempdir + "/hashserve.sock") or os.path.exists(tempdir + "cache/hashserv.db-wal")):
             time.sleep(0.5)