Pass Ocean_ice_boundary to combined Ice-ocean driver

[theresa-morrison]

Adds a needed optional argument to the update_slow_ice_and_ocean call to pass the Ocean_ice_boundary type. This new optional argument is needed to properly use the interspersed coupling option.

This change should not impact the solutions to any experiments not using the combined-ice ocean driver. At compile time the new optional argument requires a SIS2 version with commit 0006cd2 or ice_null version with commit c9afb0d.

This PR is to associated with Issue #90.

[rem1776]

@theresa-morrison It looks like the the failing build test isn't related to your code changes, our test uses ice_null instead of sis2 so the interface will need to be modified there in order to compile the test.

I'll rerun the test when that change goes through, the pr should be linked above.

[theresa-morrison]

Hi Ryan, thanks for letting me know. I see you already opened a PR to ice_null I will keep an eye on that. Let me know if we should have a meeting about this change.

[theresa-morrison]

Hi Ryan, I saw that the PR to ice_null was accepted so I added the commit tag to this PR.

[thomas-robinson]

This is a very high level interface update. Can this information be added somewhere else? Can it be put into one of the derived types that's already being passed into the update_slow_ice_and_ocean subroutine? Is this going to affect any models that are not running SIS2? The AM4 runs with SIS. We should avoid changing the coupler as much as possible.

[thomas-robinson]

@theresa-morrison Can you help update the other ice models that will need to be updated to accommodate these changes? We either need to update all of the GFDL supported ice models, or these changes need to stay internal to SIS2 and not be done at the coupler level.

[thomas-robinson]

@theresa-morrison have you been able to work on the other ice models?

[theresa-morrison]

Hi Tom, I have been trying to correct some problems in the coupling within the sea-ice model and that has been my priority for the last few weeks. I will just close this PR and the associated issue until I am ready to work on the sea-ice models.