Upgraded HttpClient version to 4.3.2-SNAPSHOT

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1529810 13f79535-47bb-0310-9956-ffa450edef68
HTTPCLIENT-1416: Fixed NPE in CachingHttpClientBuilder#build()

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1529812 13f79535-47bb-0310-9956-ffa450edef68