* Added new function calls to data_record_utilities for getting the total number of data recording groups and the data recording group pointer by its id number per customer request.
* Deleted unnecessary variable.
* Added a couple of more unit tests and fixed the return number to 0 instead of NULL for getting total number of drgs.
This tst was only run if the HOST_CPU of the run matched one
of the pre-existing files. So it was only tested on SL6. Found
that the udunits change never made it to these log files. I
updated the units and introduced only one copy of the files that
all platforms will test against.
