adding a classpath tag in order to prevent a runtime error caused by a Java bug and the JUnit 4 annotations from happening

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1591533 13f79535-47bb-0310-9956-ffa450edef68
compile before running findbugs

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1591535 13f79535-47bb-0310-9956-ffa450edef68