Bug 7981: Remove HomeOrHoldingBranchReturn syspref

Bug 7981: Remove HomeOrHoldingBranchReturn syspref

This patch removes HomeOrHoldingBranchReturn syspref and makes circ/returns.pl respect branch
circulation rules from C4::Circulation::GetBranchItemRule. Also transfer slip notice should reflect this.

Default should always be to return item to home branch.

Test plan:
- make sure syspref 'AutomaticItemReturn' is set to 'false'
- unset 'Default checkout, hold and return policy' or set 'Return policy' to 'Item returns home'
- checkout an item and do a checkin from different branch than items homebranch
- verify that you're prompted with a transfer message to item's home branch and that print slip matches

- set 'Return policy' to 'Item returns to issuing library'
- do a checkout and a checkin from branch different than item's home branch
- verify that you're not prompted with a transfer message and that holding library is your current branch

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Follow-up:
- Added 3 tests in t/db_dependent/Circulation_Branches.t to test AddReturn
  policies
- Removed HomeOrHoldingBranchReturn from sysprefs.sql
- Added notice on removing syspref in updatedatabase

QA edits:
- removed trailing whitespace in tests
- moved branchname lookup from returns.pl to template

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Mirko Tietgen <mirko@abunchofthings.net>
Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>