Trim trailing whitespace, as reminded by checkstyle

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1491836 13f79535-47bb-0310-9956-ffa450edef68
Trim trailing whitespace, as reminded by checkstyle

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1491837 13f79535-47bb-0310-9956-ffa450edef68
Update junit to version 4.9
Download it from Maven Central instead of GitHub

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1491841 13f79535-47bb-0310-9956-ffa450edef68