[#4649] Fix: Also recognize first/last name for current TYPO3 versions

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/seminars/trunk@85274 735d13b6-9817-0410-8766-e36946ffe9aa
[#5061] Fix: Test error in tx_seminars_FrontEnd_DefaultControllerTest in 6.2

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/seminars/trunk@85276 735d13b6-9817-0410-8766-e36946ffe9aa
[#5062] Fix: Test crash in tx_seminars_OldModel_EventTest in 6.2

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/seminars/trunk@85277 735d13b6-9817-0410-8766-e36946ffe9aa