NetworkPkg:Missing CloseEvent() in HttpResponseWorker

NetworkPkg:Missing CloseEvent() in HttpResponseWorker

Two additional scenarios in which CloseEvent() needs to be called:
When sending a request to http server using HTTP Head method, if the process
is success, we did a response call, and then go to exit without close the
event in Rxtoken in wrap structure and in httpinstance struceure, so
another call() to response using http get method to receive http header,
those events are not closed either..

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Nagaraj Hegde <nagaraj-p.hegde@hpe.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Zhang Lubo <lubo.zhang@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18735 6f19259b-4bc3-4df7-8a09-765794883524