WIP Fix JsonbTransient not working on superclass inherited properties

[Degubi]

Fixes #454

• Add code for checking if a property is transient in the base class
• Borrow code from issue and add it as test

All tests are passing, but I would like to know if this might break something else...

Edit: I looked around this, trying out things with interfaces & abstract classes. Not sure what is the intended behavior here, so I marked this pr 'WIP'
e.g:

This class:

public final class TransientPropertyChildUsingInterface {

    @Override
    public String getTransientAbtractProperty() {
        return "aaa";
    }

    @Override
    public String getNormalAbstractProperty() {
        return "bbb";
    }
}

When implementing this interface:

public interface TransientPropertyInterface {

    @JsonbTransient
    String getTransientAbtractProperty();

    String getNormalAbstractProperty();

    @JsonbTransient
    default String getTransientDefaultProperty() {
        return "hey";
    }

    default String getNormalDefaultProperty() {
        return "ho";
    }
}

Gives: {"normalAbstractProperty":"bbb","normalDefaultProperty":"ho"}
This is the same before & after this pr's changes

But when extending this class:

public abstract class TransientPropertySuperclass {

    @JsonbTransient
    public abstract String getTransientAbtractProperty();

    public abstract String getNormalAbstractProperty();

    @JsonbTransient
    String getTransientDefaultProperty() {
        return "hey";
    }

    String getNormalDefaultProperty() {
        return "ho";
    }
}

After the pr only gives: {"normalAbstractProperty":"bbb"}
Before the pr: {"normalAbstractProperty":"bbb","transientAbtractProperty":"aaa"}

[Verdent]

Hi @Degubi , thank you for taking care of this issue! :-) May I ask if there is any progress?

[Degubi]

Hi @Verdent!
When I saw the output I got confused over what the intended output was supposed to be, so I stopped working on this. :/