fix#3874 (http-support): make NewHttpClientImpl.execute non-blocking#3875

YianZhao wants to merge 2 commits intoeclipse-sw360:maineclipse-sw360/sw360:mainfrom

YianZhao:bug-native-httpclient-nonblocking-issueYianZhao/sw360:bug-native-httpclient-nonblocking-issueCopy head branch name to clipboard