Add Eclipse and Maven files and folders to svn:ignore.

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1574511 13f79535-47bb-0310-9956-ffa450edef68
Update JUnit to version 4.11 from 4.9.

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1574512 13f79535-47bb-0310-9956-ffa450edef68