Since scorep does not support all use cases yet, vampirtrace is still
useful in some circumstances.

* Revert "Override partial installs by default (#3530)"

This reverts commit a65c37f1.

* Revert "Add lmod files to MODULEPATH (#3912)"

This reverts commit 186d1f45.

* Package install remove prior unfinished installs

Depending on how spack is terminated in the middle of building a
package it may leave a partially installed package in the install
prefix. Originally Spack treated the package as being installed if
the prefix was present, in which case the user would have to
manually remove the installation prefix before restarting an
install. This commit adds a more thorough check to ensure that a
package is actually installed. If the installation prefix is present
but Spack determines that the install did not complete, it removes
the installation prefix and starts a new install; if the user has
enabled --keep-prefix, then Spack reverts to its old behavior.

* Added test for partial install handling

* Added test for restoring DB

* Style fixes

* Restoring 2.6 compatibility

* Relocated repair logic to separate function

* If --keep-prefix is set, package installs will continue an install from an existing prefix if one is present

* check metadata consistency when continuing partial install

* Added --force option to make spack reinstall a package (and all dependencies) from scratch

* Updated bash completion; removed '-f' shorthand for '--force' for install command

* dont use multiple write modes for completion file

* Set proper deptypes for certain build systems

* Add depends_on to namespace

* Add tests to mercurial package

* Add support for --insecure with mercurial fetching

* Install man pages and tab-completion scripts

* Add tests and latest version for all deps

* Flake8 fix

* Use certifi module to find CA certificate

* Flake8 fix

* Unset PYTHONPATH when running hg

* svn_fetch should use to svn-test, not hg-test

* Drop Python 3 support in Mercurial

Python 3 support is a work in progress and isn't currently
recommended:

https://www.mercurial-scm.org/wiki/SupportedPythonVersions

* Test both secure and insecure hg fetching

* Test both secure and insecure git and svn fetching

* Initial add of flac

* Initial add of id3lib

* Initial add of the opus codec

* Initial add of sox audio processing tools

* Cleanup spec files to be inline with current standard

* Fix pep8 compliance

* Remove un-needed configuration

* ncl: add depends_on statements for bison, flex and libiconv

* ncl: depends on flex for building and linking

* ncl: links with -ll, so requires flex with variant '+lex'

* ncl: depends on szip; external hdf5 may not provide it

* espresso: fix missing dependency on elpa, add 6.1.0

* override default libs of elpa to get shared always

* Disable parallel builds

The install step creates a bunch of links to the vim binary, e.g.
`view`.  When run with -j greater than 1 there are silent failures.

Running w/out parallelism seems to fix it.

* Only constrain the install phase to be -j 1

Thanks @adamjstewart!

* Adding new python package: py-simplejson

* Adding setuptools dependency

* Fixing typo

see https://github.com/LLNL/spack/pull/3852#pullrequestreview-32996651
for details

* ocotpus and arpack-ng: fix arpack bug and add libs to arpack-ng

also rename the variant to be consistent with other packages

* fix a bug

* flake8

Also switch to arpack-ng, which is maintained and has bugfixes,
whereas the original arpack code is abandoned.

* Add a py-fiscalyear package

* Declare supported Python versions

* opneblas: fix compilation with clang

* indentation