#1588 Add tests about ParameterAtQuadPt and GlobalParameterOperator
Currently the values are computed on each rank, whereas for those that acts as ghost it should be safer to do so through mpi communication.
Moreover, in GlobalParameterOperator there is a loop that runs just over the processor-wise data; check if ghosts should be considered as well or not (and add more specific tests if needed - all tests are currently passed)