knowledge: fix get_kbs_info query result
knowledge: fix get_kbs_info query result

* Fixes the right query executed in function.

Signed-off-by: Leonardo Rossi <5460ec99b71a72e7693c4088b5c2585e76e1c857@cern.ch>

inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio