Bug 10494: test cases for the KohaBranchName plugin

Bug 10494: test cases for the KohaBranchName plugin

To test, in a test database that has the sample branches
loaded, run

prove -v t/db_dependent/Koha_template_plugin_KohaBranchName.t

Note that this includes regression tests for the issues
reported in bug 10494; these won't pass without applying
the patch that fixes them.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>