GeneratedHydrator Mixes up private properties

[staabm]

As of current implementation, GeneratedHydrator will not distinguish between properties from following
example:

class Foo
{
    private $bar;
}

class Bar extends Foo
{
    private $bar;
}

class Baz extends Foo
{
    private $bar;
}

[pounard]

This is potentially fixed with PR #59 - it orders the private properties in hierarchy order (from the top level parent to lowest child) and set only the children private properties when they are private properties that hide the parent one.

[pounard]

Actually, it's not fixed, it's just more predictable. In order to fix this #5 must be implemented.