HV-711 Adding empty implementations for new API methods
HV-711 Returning "<return value>" from ReturnValueNode#getName()
HV-711 Returning descriptor for void methods
HV-710 Adding CrossParameterNode to paths for cross-parameter constraint violations
HV-710 Implementing CrossParameterDescriptor
HV-713 Removing superfluous type-parameter from ValidationContext. It is not needed anymore, since there is only one type of ConstraintViolation.
HV-713 Merging valiation contexts to one class
HV-713 Implementing ConstraintViolation#getExecutableParameters() and getExecutableReturnValue()
HV-713 Simplifying creation of validation contexts in ValidatorImpl
HV-713 Adding dummy implementation for BeanDescriptor#hasConstrainedExecutables