Bug 53691: Fix a copy/paste error in CFRuleRecord.clone()
also make CFRuleRecord.toString() print out more information which caused the bug to be much harder to find
Add unit tests to verify/reproduce this

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1596251 13f79535-47bb-0310-9956-ffa450edef68