HV-662 Adding test case
HV-662 Implementing equals() and hashCode() for AnnotationProxy
HV-662 Adapting test to cope with changed identity of ConstraintDescriptors
HV-659 Adding test case for ignored ParameterNameProvider using ValidatorFactory#usingContext
HV-659 Formatting (removing empty lines), renaming some variables
HV-659 Using a new BeanMetaDataManager per ParameterNameProvider