Add support for non-static @Before and @After methods

[asolntsev]

Let's say we have controller MyController with @With annotation:

@With(MySecurity.class)
public class MyController extends Controller {
}

public class MySecurity extends Controller {
  @Before
  public void myNonstaticBeforeMethod() {
  }

  @After
  public void myNonstaticAfterMethod() {
  }
}

When trying to execute any action of MyController, Play framework throws an exception:

Oops: IllegalArgumentException
Unexpected error : Unexpected Error, caused by exception IllegalArgumentException: object is not an instance of declaring class

play.exceptions.UnexpectedException: Unexpected Error
	at play.mvc.ActionInvoker.invoke(ActionInvoker.java:208)
	at Invocation.HTTP Request(Play!)
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
	at play.mvc.ActionInvoker.invoke(ActionInvoker.java:482)
	at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:467)
	at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:436)
	at play.mvc.ActionInvoker.handleBefores(ActionInvoker.java:299)
	at play.mvc.ActionInvoker.invoke(ActionInvoker.java:144)
	... 1 more