Item12367: update RequestCacheTests::upload test to catch the issue

Original Author: JanKrueger <JanKrueger@0b4bb1d4-4e5a-0410-9cc4-b2b747904278>

git-svn-id: http://svn.foswiki.org/branches/Release01x01/UnitTestContrib@16463 0b4bb1d4-4e5a-0410-9cc4-b2b747904278