Bug 37037: (RM follow-up) Add hint at end of script run

Bug 37037: (RM follow-up) Add hint at end of script run

This patch adds a hint to the end of the script to notify the end user
that they may need to run the build_holds_queue cronjob if they are
using RealTimeHoldsQueue.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 8dd9c94c5772c7481632f20af0025a4bf1e2662b)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit d0ded0c7379ded0a305e6fc21ffef4e50b0567e5)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>