Fixed Java 5 incompatibility causing a compile error with JDK 1.5

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512719 13f79535-47bb-0310-9956-ffa450edef68
Found possible cause of thread interruption during test suite execution

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1512759 13f79535-47bb-0310-9956-ffa450edef68