In order to run the drools test into an OSGi environment the Test-Jar must be OSGified. That was already done, but the generated bundle (Jar) and test bundle (Test-Jar) are exporting same packages.
These package conflicting prevents that both bundles be use by the OSGi tests classes.

For turn things easier, my suggestion is to include .test into the package name. So for example: org.drools.core.base would become org.drools.core.base.test