Add multi-thread test for JCS-73

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1549833 13f79535-47bb-0310-9956-ffa450edef68
Typo in class name

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1549835 13f79535-47bb-0310-9956-ffa450edef68