Precission lowering of systemtest, test_korzhnev_2005_15n_sq_data and test_korzhnev_2005_1h_sq_data.
The systemtests does not fail on Linux 64 bit system, but only on Mac 32 bit system. This is due to floating error deviations.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-21
Parent: [r24233]
Child: [r24235]
