Additional information for debugging the test:
log on which iteration it failed.

(It is possible to chain AssertionErrors, but JUnit does not print stack trace for the nested AE. Thus I am resorting to writing them to the log).

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1589303 13f79535-47bb-0310-9956-ffa450edef68