Bug 23695: Set holding branch to transferring branch when manually initiating a transfer

Bug 23695: Set holding branch to transferring branch when manually initiating a transfer

To test:
 1 - Go to Circulation->Transfer
 2 - Note your signed in branch
 3 - Find an item from your branch and create a transfer to branch B
 4 - Confirm the item is marked as held at your current branch and is being transferred to B
 5 - Find an item from a third branch, branch C
 6 - Transfer that item to brnach B
 7 - Confirm the item is held at your current branch and is being transferred to B
 8 - prove -v t/db_dependent/Circulation.t
 9 - prove -v t/db_dependent/Koha/Items.t
10 - prove -v t/db_dependent/RotatingCollections.t

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>