add examples for packages import in kiebases + fix transitive inclusion
(cherry picked from commit eed8af359979ad82dfad1fbfef3edfd3d492a7be)
when a KieBase doesn't specify any imported package automatically add to it all the assets in the classpath
(cherry picked from commit 51398b02219eeaf167263d11b1262910a1a4c0e5)