Eventservice specific patches: Temporary pulling down
the upstream patches. These will be remove as soon as
thee gets merged upstream.

Upstream revision information:
 - EventService : Fix retry handling for http-client
   https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/40731/18

 - EventService: https client support
   https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/31735/38

 - Add Server-Sent-Events support
   https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/41258/5

 - Add SSE style subscription support to eventservice
   https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/41319/5

 - Add EventService SSE filter support
   https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/41349/2