Update Most Builds to VL+PLMC

[bcaddy]

Summary

Updated all builds, except cosmology, to use the Van Leer (VL) integrator and Piecewise Linear Method in the Characteristic variables (PLMC) reconstruction.

I'd like @helenarichie and @ojwg to take a look to make sure I'm not breaking any of their builds.

[evaneschneider]

Just to double-check -- were you able to confirm that the spherical collapse test is actually collapsing now? It was working when I initially added the system test, but when @evazlimen documented it last August it was not.

[bcaddy]

I compared slices of the old and new fiducial data and there were qualitatively very similar; ie a big dot in the middle. I thought the old fiducial data was definitely correct but I’m not totally sure.

[evaneschneider]

Sounds good. If you could add a plot of the new slice data to the documented examples page, that would be great (ultimately we will need to do this for all the examples, but that's a longer-term project).

[bcaddy]

Sure. I assume you want a higher resulting plot like 128^3 or 256^3 rather than the low res test version?

[evaneschneider]

Yes, I think specifically the plot that results from using the example parameter file (which is 256^3).