Bug 12603: creating TestBuilder to simplify tests

Bug 12603: creating TestBuilder to simplify tests

This patch contains a new module t::lib::TestBuilder which allows to write tests easier and it contains the unit tests of this module.
For more information, see the documentation of the module.

This module uses the DBIx::Class schema and works with a clean DBIx::Class schema. In order to use it, you have to remove the current circular dependence (existing in the DBIx::Class) by applying the last patch of the bug 11518.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>