cal: Add first go at QA parameters for DAS receivers.

The TSYSMAX values based upon Tsys ranges supplied by Jan Wouterlout.
The RMSTSYSTOL and RMSVAR_SPEC are based upon some RXB reductions
where the default values proved to be consistently too low.  These
might be different for other receivers.

All values may be subject to change and additional parameters set
based upon empirical data reduction.