- remove the old LGPL license headers from all files in Spack
- add SPDX headers to all files
- core and most packages are (Apache-2.0 OR MIT)
- a very small number of remaining packages are LGPL-2.1-only
* Added exasp2 spackage
Added spackage for exasp2 proxy app
* Fixed MPI in ExaSP2
Explicitly disabled MPI when not enabled.
Set MPI variant to default as per Spack standards
* Generalized BML Passing for ExaSP2
* Modified to follow spack rules on blas
Fortunately was able to modify exasp2 build system to support spack
model for blas and lapack requirements. No guarantee is made for support
of anything other than originally supported libraries
* Fixed flake8 error
