execute @Before annotated methods before REST requests

[redrezo]

patched HttpJUnitRunner to support this
added @HttpConfig annotation and RuleStrategy enum to configure behavior
default behavior is unchanged

example:

@RunWith(HttpJUnitRunner.class)
@HttpConfig(ruleStrategy=RuleStrategy.HTTP_CALL_AFTER_BEFORE)
public class MyTest {
    @Rule
    public Destination destination = new Destination(this, "http://localhost:" + System.getProperty( "org.osgi.service.http.port" ));

    @Context
    private Response response;

    @Before
    public void before() {
        System.err.println("Test#before()");
        Bundle bundle = FrameworkUtil.getBundle(Test.class);
        BundleContext bundleContext = bundle.getBundleContext();
        ServiceReference<WebService> serviceReference = bundleContext.getServiceReference(WebService.class);
        WebService service = bundleContext.getService(serviceReference);
        service.setName("Foo");
    }

    @org.junit.Test
    @HttpTest(method=Method.GET, path="/services/hello")
    public void testServiceCall() {
        System.err.println("Test#testServiceCall()");
        assertOk(response);
        assertEquals("Hello Foo", response.getBody());
    }
}


@Path("/")
public class WebService {

    private String name = "World";

    @GET
    @Path("/hello")
    public String helloWorld() {
        System.err.println("WebService#helloWorld()");
        return "Hello " + name;
    }

    public void setName(String name) {
        this.name = name;
    }
}