Make new History metadata configurable

[mathomp4]

Due to the changes in MAPL 2.15.1 (see #1271), we now have "hard-coded" into the global metadata of MAPL History output:

:Contact = "http://gmao.gsfc.nasa.gov" ;
:Institution = "NASA Global Modeling and Assimilation Office" ;

While these are good defaults for the majority of MAPL users, some of our other colleagues at Harvard (@lizziel) and NOAA (@rmontuoro) and even non-GMAO NASA users (@mmanyin) could use MAPL for History output and would probably enjoy not having to do an extra ncatted call to change this.

So, let us allow the ability to change these values inside HISTORY.rc (and upcoming history.yaml) files a la:

INSTITUTION: "Yoyodyne Propulsion Systems"
CONTACT: "Lord John Whorfin"

We also have:

:Comment = "NetCDF-4" ;

Whatever needs to be done for the Contact and Institution can probably be extended to the Comment field as well. Might as well let users make whatever comments they'd like to as well.

[mathomp4]

Actually, I'm not sure if spaces are allowed in ESMF_Config objects (@bena-nasa, @atrayano or @tclune might know). Might be nice to have some sort of "translate underscores to spaces" sort of capability with this?

[atrayano]

Spaces are allowed in ESMF_Config and normally they are ignored. But in a quoted string they are preserved and kept

[mathomp4]

Spaces are allowed in ESMF_Config and normally they are ignored. But in a quoted string they are preserved and kept

Ahhh. And you are correct, @atrayano! I just just hacked in a config object in a random GC to test and:

INSTITUTION: Yoyodyne Propulsion Systems

printed out:

MATMAT INSTITUTION: Yoyodyne

but:

INSTITUTION: "Yoyodyne Propulsion Systems"

gave me:

MATMAT INSTITUTION: Yoyodyne Propulsion Systems

I learned some ESMF today! 😄