Gradient is not excluded in the final report _XMLQCResult.xml

[juanprietob]

There is an inconsistency when writing the report.

Some variables in the qcResult structure are set using a map to retrieve the index of the gradient.

As shown in:

The map: t_Original_ForcedConformance_Mapping[index].index_original[0]
Is used to set the values in the QCResult structure as shown in:
https://github.com/NIRALUser/DTIPrep/blob/master/src/IntensityMotionCheckPanel.cxx#L664

However, when writing the report. This structure is not used to retrieve the same variables:
As shown in:
https://github.com/NIRALUser/DTIPrep/blob/master/src/IntensityMotionCheckPanel.cxx#L4034

This could be a generalized error when writing the QCReports.