Fix soec notebook initialization problem

[eslickj]

Fixes issue #176

Fixes an initialization problem on the spec notebook.

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[dallan-keylogic]

LGTM

[lbianchi-lbl]

It seems the notebook is still failing, even though one of the jobs is being reported as passing which I think is related to #116:

[eslickj]

@lbianchi-lbl, checking on this error, some change in the last day or so broke this. I'm looking into it.

[eslickj]

Okay, it was @andrewlee94's changes to model serializer that broke this one. It's my fault for using a default mutable argument, but None means something else. It will take some thinking to figure out how to properly fix this.

[eslickj]

@lbianchi-lbl and @andrewlee94 found the problem was that the broken example was depending on changing the default arg, so the good news is that pylint is finding errors.

[eslickj]

I'll keep working this until the tests pass.

[eslickj]

This is too complicated to sort out. I'm just going to go ahead and move the SOFC-IES to publications. I'll close this PR and once everything is in its new home, I'll open a new PR to remove them.