add metadata for orbital parameters in cam_control_mod

[peverwhee]

Tag name (required for release branches):
Originator(s): peverwhee

Description (include the issue title, and the keyword ['closes', 'fixes', 'resolves'] followed by the issue number): Adds metadata for orbital parameters in cam_control_mod.F90

Describe any changes made to build system: N/A

Describe any changes made to the namelist: N/A

List any changes to the defaults for the input datasets (e.g. boundary datasets): N/A

List all files eliminated and why: N/A

List all files added and what they do:
A src/control/cam_control_mod.meta

• add metadata file for cam_control_mod.F90

List all existing files that have been modified, and describe the changes:
(Helpful git command: git diff --name-status development...<your_branch_name>)
M .gitmodules

• update atmospheric_physics hash to grab changes in update "radians" to "rad" atmospheric_physics#173

M src/control/cam_control_mod.F90

• add necessary comments for CCPP parsing

M src/data/registry.xml

• notify the registry of the new metadata file

M src/physics/units/physics_grid.meta

• update "radians" to "rad"

M test/unit/sample_files/phys_types_dup_section.meta

• update "radians" to "rad"

If there are new failures (compared to the test/existing-test-failures.txt file),
have them OK'd by the gatekeeper, note them here, and add them to the file.
If there are baseline differences, include the test and the reason for the
diff. What is the nature of the change? Roundoff?

derecho/intel/aux_sima: all non-existing failures PASS

derecho/gnu/aux_sima: all non-existing failures PASS

If this changes climate describe any run(s) done to evaluate the new
climate in enough detail that it(they) could be reproduced:

CAM-SIMA date used for the baseline comparison tests if different than latest:

[peverwhee]

I took a stab at standard names, as there is nothing in the dictionary and we haven't decided on them as a group in the spreadsheet.

[mattldawson]

looks great!

[cacraigucar]

A conversation starter for @nusbaume - There is one flag_for standard name and a bunch of do in the standard names repo. An alternate name could be do_aqua_planet

[peverwhee]

ooh i like do_aqua_planet better. I've changed it to that, but am happy to hear Jesse's feedback when he returns!

[nusbaume]

Looks good, but did have some (pedantic) change requests, along with a question.

[nusbaume]

Everything looks great to me now, thanks @peverwhee!