Made changes to the profiling script of NS_CPMG_2SITE_3D.
Need to use the full model, when r2a and r2b is specified.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-18
Parent: [r24093]
Child: [r24095]
