Bug 10508: add unit tests for C4::Branch

Bug 10508: add unit tests for C4::Branch

Unit tests are wrap in a transaction.

To test:
prove t/db_dependent/Branch.t
t/db_dependent/Branch.t .. 1/36 Using a hash as a reference is deprecated at t/db_dependent/Branch.t line 207.
t/db_dependent/Branch.t .. ok
All tests successful.
Files=1, Tests=36,  1 wallclock secs ( 0.02 usr  0.02 sys +  0.13 cusr  0.01 csys =  0.18 CPU)
Result: PASS

http://bugs.koha-community.org/show_bug.cgi?id=10508
Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests and QA script.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>