Add UCAR software version to ROPP files

[Ian Culverwell]

Axel von Engeln (EUM) writes:

I just noted something else, within our reprocessing, we are also
downloading and converting UCAR data with ucar2ropp. Now I noted
that the UCAR S/W version is not kept. This is available in the
filename, e.g. 2010.2640 is one of their version. I think that
should be put into the ROPP global attributes somewhere, maybe in
the S/W version (although that is a bit ambiguous). What do you
think?

I think it's worth looking at.

[Ian Culverwell]

Code changes, including the fixing of a bug which was preventing the ???Prf files from producing the correct software_version global attribute, introduced at r4763.

(We set the processing_software global attribute equal to SSSS_VVVV if the filename is ???Prf_IIII.YYYY.DDD.HH.MM.GGG_SSSS.VVVV_nc or atmPhs_IIII.YYYY.DDD.HH.MM.GGG_SSSS.VVVV_nc.)

[Ian Culverwell]

Closing ticket.