@Before
    public void setup() {
        policyFactory = new PolicyFactoryImpl(Collections.emptyMap());
    }
Test {@link IPolicyFactory} functionality, in particular ensuring classes are
discovered, loaded, instantiated and configured as expected.

@author Marc Savy <msavy@redhat.com>
gateway/engine/core/src/test/java/io/apiman/gateway/engine/impl/PolicyLoadTest.java