Pull request #923: CAS-14525 update snr default value to use default value used by web service
Merge in CASA/casa6 from CAS-14525 to master
* commit '743e531fe73e7e0d8152c94e790ad29c089c8f26':
small doc changes
added test to check parms when snr="default" and snr=5
doc updates
updates to make default value work
small doc fix
some changes, checking in xml updates to build casadocs
