Update openmpi on Nautilus to 4.1.6

[climbfuji]

Summary

Use openmpi@4.1.6 instead of 4.1.5rc2 on Nautilus.

I installed an openmpi-4.1.6 environment for the spack-stack-1.6.0 release and made the same modifications as for the existng unified-env environment (#941: netlib, fftw, sp link).

Notes.

1. This PR also includes a spack submodule pointer update for hdf5@1.14.3 fpe patches contributed by @rhoneyager-tomorrow (HDF5 FPE fixes. spack#408). I ran the ctests on AWS ParallelCluster Intel with this bug fix included, and the only failures where:

	1506 - ufo_test_tier1_test_ufo_qc_historycheck (Failed)
	1507 - ufo_test_tier1_test_ufo_qc_historycheck_mpi (Failed)
	1508 - ufo_test_tier1_test_ufo_qc_historycheck_unittests (Failed)
	2058 - test_soca_parameters_diffusion_hz (Failed)
	2075 - test_soca_dirac_diffusion (Failed)
	2083 - test_soca_3dvar_diffusion (Failed)
	2089 - test_soca_3dhyb_diffusion (Failed)

2. This PR also fixes CI tests on the AWS R&D ParallelCluster (which I introduced in my previous PR)

Testing

Built environment and ran jedi-bundle ctests. Only the "expected failures" occurred.

Applications affected

All MPI applications on Nautilus

Systems affected

Nautilus

Dependencies

• waiting on HDF5 FPE fixes. spack#408

Issue(s) addressed

Resolves #1006

Checklist

• This PR addresses one issue/problem/enhancement, or has a very good reason for not doing so.
• These changes have been tested on the affected systems and applications.
• All dependency PRs/issues have been resolved and this PR can be merged.