Nightly builds with MacOS started failing again
due to an upgrade of the default virtual environment
that now uses Python 3.8

This makes us hit #14102 and every build fails. This
commit should be reverted along with the fix to #14102.

* For detecting Cray: CRAYPE_VERSION is not used, but MODULEPATH

* Fix typo and write Cray with a capital

* Add install tests
* Add pkgconfig dependency to find dependency headers (specifically
  wcslib)

* python: RPATH on fj

* python: patch _is_gcc

* Additional versions of py-jsonschema.

* Tweak to force Maestro to use jsonschema@3.2.0:

* Correction of whitespace (flake8 error).

* Merges importlib's Python  version conditons

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Add new versions of spfft

* Extend CudaPackage and use virtual fftw package

Co-authored-by: Simon Pintarelli <simon.pintarelli@cscs.ch>

* Add CUDA 11 compatibility note

* Depend on older cuda <= 10 for spfft <= 0.9.11

Co-authored-by: Simon Pintarelli <simon.pintarelli@cscs.ch>

isaac-server can not find jansson if jansson2.10+ is used.

* Change buildcache create `NoOverwriteException` back to a warning.

* introduce logic for boost+context dependency and generic_context variant

* fix OTF2 instrumentation minor problem

* default coroutine impl depends on platform

* fix flake8

* add reference to ~generic_coroutines conflict info

* Update var/spack/repos/builtin/packages/hpx/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Octopus: Add support for version 10.0.

Fix compilation when using the MKL as a provider for BLAS/LAPACK. Octopus will now detect that the MKL also provides the FFTW API and will refuse to compile when both the FFTW library and the MKL are given to the configure script.

* Octopus: Add supported version range for libxc.

* berkeley-db: add version 18.1.40, update build options in package

* combine adamjstewart's changes

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* [kassiopeia] New package

* [kassiopeia] Remove master branch, update dependencies

* Update var/spack/repos/builtin/packages/kassiopeia/package.py

Unable to test since I do not have a license to intel-parallel-studio, but I see no reason why it would not work if.

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* [kassiopeia] depends_on mpi

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* [kassiopeia] cmake_args with self.spec.satisfies and elses

* [kassiopeia] args.extend -> args.append

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* h5py: explicitly specify version

hdf5@1.10.5 on Cray is wrongly detected as 1.8.4.

* Update var/spack/repos/builtin/packages/py-h5py/package.py

Thanks. Also had this first, then CI was complaining about line length ...

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Hotfix: move CUDAHOSTCXX

Set only in dependent packages.

* dependent compiler

Before:

```console
$ licensee diff --license mit LICENSE-MIT
Comparing to MIT License:
Input Length:      1092
License length:    1020
Similarity:      92.46%
diff --git a/LICENSE b/LICENSE
index 0ce42af..be0ff1c 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,3 +1,4 @@
{+spack project developers. see the top-level copyright file for details.+}
permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "software"), to deal in
the software without restriction, including without limitation the rights to
```

After:

```console
$ licensee diff --license mit LICENSE-MIT
Comparing to MIT License:
Input Length:       1020
License length:     1020
Similarity:      100.00%
Exact match!
```

This gets us a 100% license match from GitHub's `licensee` tool.

* openfst: upgrade version and gcc constraint

* refine version format

`spack buildcache list` was trying to construct an `Arch` object and
compare it to `arch_for_spec(<spec>)`. for each spec in the buildcache.
`Arch` objects are only intended to be constructed for the machine they
describe. The `ArchSpec` object (part of the `Spec`) is the descriptor
that lets us talk about architectures anywhere.

- [x] Modify `spack buildcache list` and `spack buildcache install` to
      filter with `Spec` matching instead of using `Arch`.

- [x] Make it easier to get a `Spec` with a proper `ArchSpec` from an
      `Arch` object via new `Arch.to_spec()` method.

- [x] Pull `spack.architecture.default_arch()` out of
      `spack.architecture.sys_type()` so we can get an `Arch` instead of
      a string.

Ci is currently failing on brew update with the error:
```
Error: Cannot install bazelisk because conflicting formulae are installed.
  bazel: because Bazelisk replaces the bazel binary

Please `brew unlink bazel` before continuing.

Unlinking removes a formula's symlinks from /usr/local. You can
link the formula again after the install finishes. You can --force this
install, but the build may fail or cause obscure side effects in the
resulting software.
```
Avoiding:
```
$ brew update
$ brew upgrade
```
solves the issue by preventing the risk of conflicting formulae

With experimental CUDA support and some patches to make it compile.

Currently +shared and +cuda conflict, this has to be fixed upstream.

* Run Python2.6 unit tests on Github Actions
* Skip url tests on Python 2.6 to reduce waiting times
* Skip foreground background tests on Python 2.6 to reduce waiting times
* Removed references to Travis in the documentation
* Deleted install_patchelf.sh (can be installed from repo on CentOS 6)

* Update LBANN, Hydrogen, Aluminum to inherit CudaPackage
* Update CMake constraints: LBANN, Hydrogen, and Aluminum now require
  cmake@3.16.0: (better support for pthreads with nvcc)
* Aluminum: add variants for host-enabled MPI and RMA features in a
  MPI-GPU RDMA-enabled library
* NCCL: add versions 2.7.5-1, 2.7.6-1, and 2.7.8-1
* Hydrogen: add version 1.4.0
* LBANN: add versions 0.99 and 0.100
* Aluminum: add versions 0.4.0 and 0.5.0