Bump the web socket worker's pool size

https://bugzilla.redhat.com/show_bug.cgi?id=1391475

We still need to figure out if we need more or less connections but
hopefully this helps minimize the infinispinners QE is seeing.

Temporarily replacing #12572 while we continue to discuss the details.

config/settings.yml

@@ -1393,6 +1393,6 @@
       :memory_threshold: 1.gigabytes
       :nice_delta: 1
     :websocket_worker:
-       :connection_pool_size: 8
+       :connection_pool_size: 14
        :memory_threshold: 1.gigabytes
        :nice_delta: 1