Make copy of jsasubmit for temporary HARP testing

The new script "jsahpxharpnit" will be a temporary script for
testing the HARP HEALPix tiled reductions on a night at a time,
as per my action item from the JSA meeting of 6/17/14.
jsahpxharpnit: run in night mode only

Also removed check for files being at CADC.
jsahpxharpnit: adjust log messages for this script
jsahpxharpnit: adjust observation grouping
Submission: add tag prefix option

Apply this for jsahpxharpnit to mark these as temporary
HEALPix recipe instances.
jsahpxharpnit: include mode in current hash
jsahpxharpnit: remove FTS-2/POL-2 test