Classpath duplicates detected: javax/inject/Inject.class

The Neutron build fails in integration-test-standalone due to junit.framework.AssertionFailedError: Classpath duplicates detected: javax/inject/Inject.class.

This is from the (infrautils) ClasspathHellDuplicatesCheckRule used in the NeutronE2ETest.

Fixing this properly is important in light of https://github.com/vorburger/opendaylight-simple/ where a clean "flat" classpath is even more critical tomorrow than it is today in standalone tests.