Bug 27064: (QA follow-up) Do not create transfer prior to accepting it

Bug 27064: (QA follow-up) Do not create transfer prior to accepting it

This patch prevents the cancellations we were seeing. Transfers were
being created pre-emtively for reserves in branchtransfers before the
librarian had selected their prefered action. As such, we were getting
double lines in the branchtransfers table.

Signed-off-by: Joonas Kylmälä <joonas.kylmala@helsinki.fi>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>