Tool_Lock = when no $expire time is given - release is disabled

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3372 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
Webservice REST: fixed error handling

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3373 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
build auto version (2833) ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3374 1f8fe7d8-47f0-464c-8d0a-336f4953ab05