MDW-2391 fix - call proper shutdown instead of shutdown now#721

koszta5 wants to merge 1 commit intoapache:masterapache/httpcomponents-client:masterfrom

koszta5:HTTPCLIENT-2391-Bug-in-closing-AbstractHttpAsyncClientBase-causing-long-lived-classloaderskoszta5/httpcomponents-client:HTTPCLIENT-2391-Bug-in-closing-AbstractHttpAsyncClientBase-causing-long-lived-classloadersCopy head branch name to clipboard