Modified unit tests demonstrating edge cases 'no Rex' failures of the model 'MMQ CR72'.
This was pointed out in post http://article.gmane.org/gmane.science.nmr.relax.devel/5940.
And in post http://article.gmane.org/gmane.science.nmr.relax.devel/5946.
This follows from the ideas in the post http://article.gmane.org/gmane.science.nmr.relax.devel/5858.
This is related to: task #7793: (https://gna.org/task/?7793) Speed-up of dispersion models.
