Bug 27068: Control hold group logic in HoldsQueue

Bug 27068: Control hold group logic in HoldsQueue

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit e82091f40a5193ff3fb47073ddb9b11f94645276)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 6b5c5c00d4fe583d0103dde1da5a6e0e3d6084b9)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>