Search for uppercase variants of the package vars as well

For compatibility with packages that believes that every variable
should be in uppercase, we try this variant when adding relevant
variables to the project.
Use camel-case in SuperLU's name

Originally, I added FindSuperLU with uppercase since the variables it
returned had that case. Now the scripts should be patched so that it
searched for uppercase amongst the variables as well, so the module
name can retain its original case (and for compatibility with DUNE)
Enable debug tracing when finding modules