busy load-balance test

git-svn-id: svn://svn.caucho.com/home/svn/svnroot/resin/trunk@10025 9c94448d-38f1-0310-a231-d98308ff1ebf
busy-recover-time configuration

git-svn-id: svn://svn.caucho.com/home/svn/svnroot/resin/trunk@10026 9c94448d-38f1-0310-a231-d98308ff1ebf