add new JRA 1.5 streams for datm and drof

[alperaltuntas]

trafficstars

Description of changes

Add new JRA 1.5 streams for datm and drof.

Are changes expected to change answers (bfb, different to roundoff, more substantial): existing datm and drof modes remain b4b.

Any User Interface Changes (namelist or namelist defaults changes): none

Testing performed (e.g. aux_cdeps, CESM prealpha, etc): pr_mom, G runs with new datm and drof modes

Hashes used for testing: 3.0alpha3a