WulfHans

I realized, my input file already uses my local version of the UMAT interface (`AbaqusUMATStressCustom`). Just delete the `Custom` and it should work. If you want to have a look...

Minimal proof for the the issue (btw: It would be really useful, if you could attach .i files directly): [UMAT_test_min.zip](https://github.com/idaholab/moose/files/9302555/UMAT_test_min.zip) The prescribed boundary condition is shear F_xy=0.5 Your can switch...

> The workflow here would be to start a pull request that adds the minimal non-working example as a new test that will right away fail in our CI system....

PR contains the fix for the transposing issue. Concerning the rotation problems: I will put this in a new branch and PR, so you can review accept it separately. Good...

PR with fix for the rotation problem is up. The success with fixing the other tests (which now partially fail, no surprise) is mixed: `umat/print.print_shear_print` is easy to fix, just...