Check global consistency in configurator tests

Use `portal_alarms/check_consistency` after configuration to make sure that every document created by configurator or part of the dependency business template is valid.

For now we have two exceptions (that are some TODO for the future):
 - Web Sites, because upgrader constraints are not ran by configurator at this point
 - Business Configuration, because most of the configurator item classes don't fully follow the protocol of constraints, their `fixConsistency` method always return "something needs to be fixed" without actually checking.

See merge request !1562