1. If there is no resource a user can see (getObjects) an empty list is
returned from now on instead of a list with an empty element.
2. If a session does not exist (tgAddActiveRole) a fault is returned
instead of an empty response.


git-svn-id: https://textgridlab.org/svn/textgrid/trunk/middleware/tgauth@2164 7c539038-3410-0410-b1ec-0f2a7bf1c452