Update buildDomainObject method in Repository

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/esolr/trunk@81339 735d13b6-9817-0410-8766-e36946ffe9aa
Added method to handle single and multi value attributes for the findByInstructions method

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/esolr/trunk@81341 735d13b6-9817-0410-8766-e36946ffe9aa