Add a check to see that the 'all done' message is printed

[greschd]

Currently, a calculation that is hard-killed during execution can still have exit code 0 - since none of the error messages that we look for is triggered. This could be avoided by checking for the

All done: wannier90 exiting

message. I'm not sure if that should be there in all circumstances, but if yes it would be a reliable way to see when the output is truncated.

[greschd]

Note: when running Wannier90 with -pp, All done: wannier90 exiting is not printed.

Instead, the message is Exiting... aiida.nnkp written..