A sligthly modified patch from Christoph Neuroth for "Exceptions logged when caches contain collections with unserializable objects" https://issues.apache.org/jira/browse/OFBIZ-5184

jacopoc commited revision 1352575 which would prevent stack traces to be logged when viewing the cache overview screen in /webtools. However, a stacktrace is still logged when the caches contain collections which themselves contain objects which cannot be serialized.

jleroux: I simply used logWarning instead of info

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1480079 13f79535-47bb-0310-9956-ffa450edef68