Upgraded HttpCore to version 4.2.1
Upgraded HttpCore to version 4.2.1

git-svn-id: 897293da6115b9493049ecf64199cf2f9a0ac287@1352844 13f79535-47bb-0310-9956-ffa450edef68

atlassian/httpclient,atlassian/httpclient,cmbntr/httpclient,UlrichColby/httpcomponents-client,cmbntr/httpclient,ok2c/httpclient,apache/httpcomponents-client