Feature/add 1ob test

[twsearle]

Description

Add ctests to cover the eORCA025 mesh and alter one of the observations so that it is on the boarder between the two tasks when MPI=2. This gives a failing test until we merge developments for atlas-orca so that we can add halos.

Issue(s) addressed

Resolves #77
Part of #53

Dependencies

We should add the test without depending on the atlas orca change or any other change.

Impact

Expected impact on downstream repositories or workflows:
None

Checklist

• I have updated the unit tests to cover the change
• New functions are documented briefly via Doxygen comments in the code
• I have linted my code using cpplint
• I have run the unit tests
• I have run mo-bundle to check integration with the rest of JEDI and run the unit tests under all environments

[twsearle]

@s-good this PR contains a test of the behaviour of the checkerboard partitioner. Once fixed, we ought to be able to remove the set_property line in CMakeLists and have the tests all pass.

[s-good]

Looks great, thanks.

[s-good]

This line doesn't work. I'm not sure what it should be, though.

[DJDavies2]

This doesn't build for me:

/home/h01/frwd/cylc-run/orca-jedi-92/share/mo-bundle/orca-jedi/src/orca-jedi/geometry/Geometry.cc: In constructor ‘orcamodel::Geometry::Geometry(const eckit::Configuration&, const eckit::mpi::Comm&)’:
/home/h01/frwd/cylc-run/orca-jedi-92/share/mo-bundle/orca-jedi/src/orca-jedi/geometry/Geometry.cc:57:30: error: ‘class oops::Parameter’ has no member named ‘set’
57 | params_.sourceMeshHalo.set(0);

[twsearle]

apologies both, I was using the CI to test the build as I could not get an interactive build to work on my local machine for this change.