Update testsuite names of datafiles
In the Kalman Smoother testfiles we have the following:
- gen_data.mod creates a datafile called "data.mat"
- test_compute_Pinf_Pstar_data.mod creates a datafile called "Data.mat"
There could be a race condition on systems that don't distinguish between upper and lower cases (e.g. my MacBook for some reason)
Edited by Willi Mutschler