Update RadMon transfer scripts to work on hera

[EdwardSafford-NOAA]

RadMon file transfer scripts were updated to perform file transfers from hera, if user has password-free access to the web server (emcrzdm).

The transfer.sh script was also made a bit smarter. It now:

1. Checks to see if there is a copy of the html and other web services files in $TANKimg (source directory) and syncs those files with the corresponding server directory. Any new changes in $TANKimg are not overwritten though.
2. Creates the proper directory on the server if it doesn't exist (necessary for initial installation).
3. Syncs the $TANKimg directory and pngs sub-directory with the corresponding directory on the server.

Testing has been completed on hera and wcoss2.

Completes #92

[DavidHuber-NOAA]

Looks good!

[ADCollard]

@EdwardSafford-NOAA Sorry was halfway through testing this when Hera went down. It looks good though.

[EdwardSafford-NOAA]

CI test issues continue on intel. The problem is with netcdf-c.4.7.4 installation. This has been an ongoing issue for some months. When it initially occurred setting the ubuntu version to 20.04 instead of "latest" did allow the test to run to completion. However the test began failing again shortly thereafter. I've set the ubuntu version back to 'latest' and for now we're going to have to live with a failed CI test.