HTTPCLIENT-1414: ClientConnectionManager should honor context classloader
Contributed by Kohsuke Kawaguchi <kk at kohsuke.org>

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/branches/4.2.x@1529480 13f79535-47bb-0310-9956-ffa450edef68