Support spied objects with Mockito

[hprange]

Mockito is a really nice and useful Mock framework and it has a powerful implementation of test spies. Spied objects can be partially stubbed, without changing the overall behavior of the object. Spying EOs requires a couple of boilerplate code and the WOUnit annotations cannot be used:

@test
public void testSomething() {
Foo foo = Mockito.spy(new Foo());
ec.insertSavedObject(foo);
}

We could offer a better option:

@SPY @dummy
private Foo foo;

I have to check if the @SPY annotation from Mockito will play nice in this scenario. Otherwise, the WOUnit can provide a different annotation (@spied maybe) to avoid naming clash.

IMPORTANT: Mockito must not be a requirement for people in order to make use of WOUnit.