hooks: decrease pool interval to 10ms. For SVN operations and lots of requests

we can save tons of time this way. It's a good balance value.

rhodecode/lib/hooks_daemon.py

@@ -133,7 +133,7 @@ class HttpHooksCallbackDaemon(ThreadedHookCallbackDaemon):
 
     # From Python docs: Polling reduces our responsiveness to a shutdown
     # request and wastes cpu at all other times.
-    POLL_INTERVAL = 0.1
+    POLL_INTERVAL = 0.01
 
     def _prepare(self):
         log.debug("Preparing HTTP callback daemon and registering hook object")