Merge changes From Thomas Weiler / Rudolf Schimassek (KIT) to usertests:
"changed strings to lower case, as parName is given in lower case letters by pxar"

Some changes by me:
* remove commented out code lines
* remove added FLAG_FORCE_MASKED since this is default now
Fix last parameter PIX1 -> pix1 as pointed out by Thomas Weiler. Thanks!
Do not use hardcoded value for DAC_max since API provides nice dictionary
lookup for DAC range.
Fixed pixel seletion, now the selected pixel should be used in the test and not only the one selcted in the tesParamer.dat
Merge pull request #143 from thweiler/master

Fixed pixel seletion, now the selected pixel should be used in the test ...