As of June 2016 using the org.hamcrest.core, org.mockito.mockito-core and org.objenesis from the Orbit, Eclipse Release or Eclipse Updates P2 sites does not work in an OSGi environment. This project generates a P2 update site of the mentioned bundles with the help of the p2-maven-plugin.
The upstream artifacts released on Maven Central are used. Where neccessary modifications to the manifest files of the bundles are applied.
The update site can be found here.