Bug 28588: Add Koha::Checkouts::ReturnClaim->resolve

Bug 28588: Add Koha::Checkouts::ReturnClaim->resolve

This patch introduces a high-level method for resolving claims.
The behavior intends to replace the code in the API controller that is
used for resolving a claim.

To test:
1. Apply this patches
2. Run:
   $ kshell
  k$ prove t/db_dependent/Koha/Checkouts/ReturnClaim.t
=> SUCCESS: Tests pass
3. Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>