Accessibility of declarative models in defaultPkg

Unit Tests: https://github.com/droolsjbpm/drools/commit/7f56c141a

If a declarative model is not added to an explicit package it appears impossible to use the declarative model from any package other than the 'defaultPkg' itself.

Tests 'testModelInDefaultPackage1' and 'testModelInDefaultPackage2' create a declarative model in the 'defaultPkg' and attempt to use the model from a rule in a different (explicit) package.

Tests that I'd expect to pass (one or the other, or both?) are @Ignored.