Tests fail on pythonPackages.scipy >= 1.5.0. This was raised in https://github.com/oxfordcontrol/osqp-python/issues/44 They are being addressed in https://github.com/oxfordcontrol/osqp-python/pull/46, and should be re-enabled for the next release.
Also add scipy. Cleanup commit slightly for formatting. Removing mkl allows this to be built in Hydra (mkl = unfree), and it seems the mkl dependency is somewhat optional given downstream packages build cleanly when removing mkl.
Oxford Splitting QP solver. Dependency for cvxpy -> qiskit-aer.