Partial fix for Bug 4870, Damaged status does not prevent items from being selected...

Partial fix for Bug 4870, Damaged status does not prevent items from being selected for reserves

This patch changes the holds queue build process in order to
require that items not be damaged in order to appear in the
holds queue report.

Revision adds a check for the AllowHoldsOnDamagedItems preference to
determine whether a damaged item should be included in the holds
queue report.

Signed-off-by: Christophe Croullebois <christophe.croullebois@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>