preferentially use manual FLOYDS spectra over automated ones

[jchate6]

When Neoexchange is plotting spectra for a target it should always choose the manually produced spectrum over the automatically produced spectrum if the choice is available.
there are a couple of ways to differentiate them:
The final automated filename has the format: nttobjectname_ftn_YYYYMMDD_merge_6.0_59229 _1_2df_ex.fits
the final manual result usually has the format: trim_nttobjectname_ftn_YYYYMMDD_merge_6.0_59228 _1_e.fits

Currently we add 2df_ex to the end of the manual version and delete the automated version, but if the automated floydspec runs again, the results of that run will take precedent.