Element_Service: fixed the bugfix

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3796 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
KeyValue: Added cache option + bugfix for metadata

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3797 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
build auto version (2931) ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3798 1f8fe7d8-47f0-464c-8d0a-336f4953ab05