core: Fix vds_group_sp.sql

Fix for Change-Id: I5847d234e396fe8a83017fb25a5139f552e7c61b
Table name was not changed in internal SELECT clause.

Change-Id: I7d1a191ef1610e80f72c9bb01895e00e6b58503e
Signed-off-by: Ofri Masad <omasad@redhat.com>