* Add versions 5.2.0 and 5.1.0
* Avoid adding version 6.0.0: this version has a new API that is
  not compatible with older versions (and dependents may break with
  it)
* Added comment block explaining the problems with version 6.x
* Replace old datumgrid resource (1.7) with new (1.8)
* Add speculative sqlite dependency for when a 6.x version is added

* add version 7.0.1
* replace md5 with sha256 for various versions.
* v7.0.1 fixes some environment hacking to properly find MPI and
  system architecture

Directory layouts using ${NAMESPACE} were broken. This addresses that
and adds a test to prevent regression.

This adds a stub script for mpirun and other standard executables
when installing OpenMPI with slurm. The purpose is to make the
removal less of a surprise to administrators/users: it explains why
they were removed and how to restore them.

Ensure that netcdf-cxx uses the Spack-installed hdf5 and netcdf4
rather than system-installed versions.

Also constrain the py-arrow version to depend on the same version
of arrow (e.g. 0.12.1 of py-arrow depends on 0.12.1 of arrow)

* Split get_compiler_version into two functions:
  get_compiler_version_output runs the compiler with the relevant
  option to print the version; extract_version_from_output determines
  the version by examining this output. This makes it easier to test
  the customized version detection for each compiler. Users can
  customize this by overriding the following:
  * version_argument: this is the argument that tells the compiler to
    print its version. It assumes that the compiler will report its
	version if invoked with a single option (like "--version")
  * version_regex: the regular expression used to extract the version
    from the compiler argument. This assumes that a regular
	expression is sufficient to extract the version, and that the
	version can be extracted from a single capture group (Spack uses
	the first capture group)
  * default_version: allows you to completely override all version
    detection logic
  * get_compiler_version_output: if getting the compiler to report
    its version is more complex than invoking it with a single arg
  * extract_version_from_output: if it is difficult to define a regex
    that can be used to extract the version from the output
* Added tests for version detection of most compilers
* Removed redundant code from xl_r compiler class (by inheriting
  from xl compiler definition)

* adding package to install squashfs for singularity

* dont need os import

Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

* updating md5 to sha1 for squashfs package

Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

* two blank lines

Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

QMCPACK MKL buglet. Now you are able to use the Intel compiler with other BLAS and LAPACK providers, no longer forced to use MKL. (#11019)

Replace the original implementation of the "memoized" decorator with
an implementation that exposes the docstring and arguments of the
wrapped function. This is achieved using functools.wraps.

* add libs property to IntelMkl and IntelParallelStudio
* fix scalapack_libs when MPI is provided by intel-parallel-studio