Changed default namelist and streams to E3SM default

[akturner]

Changed Registry.xml configs and streams to E3SM default
Added forcing directory to forcing filenames in Registry
Updated SnowAgingPropertiesInput file from snicar_drdt_bst_fit_60_c04182019.nc to snicar_drdt_bst_fit_60_c04262019.nc
Modified testing to allow exceptions in individual tests without then stopping and allowing remaining tests to run
Added e3sm default configuration to configurations
Added e3sm default configuration to tests

[akturner]

Note file change for SnowAgingPropertiesInput

[njeffery]

@akturner, the namelist for e3sm_default still has the old default values. The streams file looks okay.

[akturner]

@njeffery: Thanks for noticing that - I will fix ASAP.

[akturner]

@njeffery, @proteanplanet: With the e3sm default options the restartability test failed, so maybe a variable is missing from restart? Any ideas what that would be?

[proteanplanet]

@njeffery, @proteanplanet: With the e3sm default options the restartability test failed, so maybe a variable is missing from restart? Any ideas what that would be?

@akturner Thanks for trying to get this through. I'll take a look at this next week when V2 is out of the way. For the record, I've done an ERS test within E3SM on G-cases with these default settings, and it passed, so a quick comparison between the two configurations should reveal the problem.

[njeffery]

@akturner : there are two config options that need to be turned on during restarts: config_do_restart_snow_density = true and config_do_restart_snow_grain_radius = true. The testsuite.snow_tracer_physics.xml has them included with the option "snow_tracer_physics" value="True".

[akturner]

@njeffery , @proteanplanet : I've fixed the restartability testing issue

[proteanplanet]

Since this passes all tests, and all namelist options for the default E3SM V2 configuration are switched on, I approve this request. Thanks @akturner!

[njeffery]

@akturner : While testing on anvil, I found a couple of things that you may want to roll into this PR. The get_data.py script has old python 2 syntax that no longer works with python 3. string.strp should be changed to str.strp. Another really minor thing, the testing readme file describing set-up of the mpas_seaice conda environment should have conda install -n mpas_seaice -c anaconda six

[njeffery]

Looks good. Passes parallelism and restartability. I'll add a consistency check in MPAS for snow restart flags in a later PR.

[akturner]

@njeffery I removed python 2 support from the script, removing the string and six module usage