fix SPHInX restarts

[freyso]

restarts from waves or density must rewrite initialGuess group

[coveralls]

Pull Request Test Coverage Report for Build 2460516400

• 16 of 28 (57.14%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.006%) to 69.108%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pyiron_atomistics/sphinx/base.py	16	28	57.14%

Files with Coverage Reduction	New Missed Lines	%
pyiron_atomistics/sphinx/base.py	2	82.31%

Totals
Change from base Build 2413518148:	-0.006%
Covered Lines:	11689
Relevant Lines:	16914

---

💛 - Coveralls

[freyso]

I am lost with how debug the failed notebook, because it seems the SPHInX job has not run properly. Is there any way of running the failing notebook interactively using this version of pyiron (i.e. from the current branch), to see what might have happened?

[jan-janssen]

I am lost with how debug the failed notebook, because it seems the SPHInX job has not run properly. Is there any way of running the failing notebook interactively using this version of pyiron (i.e. from the current branch), to see what might have happened?

You can run any branch on mybinder (alternatively to testing locally):

[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/pyiron/pyiron_atomistics/fix_restart_sphinx)

[skatnagallu]

Looks good to me.

[samwaseda]

I tried to find a problem but it looks good to me. The only one thing is that def restart is now somewhat a bit lengthy (for the python standard). At some point we should probably think about reorganising it.

[freyso]

OK, I am done with fixing. For the test coverage decrease, not sure if this is a problem. I personally don't think it makes sense to implement unit testing for the restart, as this would require a successfully completed sphinx job (incl. density + waves sxb files).
@jan-janssen - any thoughts/concerns about this?
From my side, this can be merged.

[samwaseda]

Since some people need it (i.e. me) I merged it