setup.cfg: exclude tmp/**, .eggs/** and build/** from pycodestyle linting

See merge request !1165

Raoul Hidalgo Charman authored Jan 23, 2019 and Jürg Billeter committed Feb 19, 2019

Makes artifactdir and builddir obsolete.

Fixes #870

Raoul Hidalgo Charman authored Feb 11, 2019 and Jürg Billeter committed Feb 19, 2019

Will check and move old artifact directory if it exists, and create
symlink linking old directory to new.

Part of #870

Raoul Hidalgo Charman authored Jan 25, 2019 and Jürg Billeter committed Feb 19, 2019

This sits in Context allowing artifact cache to check the cas quota
while not being used for CASServer.

A lot of code that checks cache quota has been touched.

Part of #870

root cache directory

Closes #870

See merge request !1100

doc/../arch_data_model: minor tweaks

See merge request !1166

Ensure that a unique cache key is used for different test variants. This
revealed that the test actually fails with --on-error=quit. Marking that
test variant as expected failure until this is fixed.

#534

tests/integration/cachedfail.py: Fix test_push_cached_fail

See merge request !1167

A plugin's deprecation warning may be silenced by a project by adding
the plugin to the list 'supress-deprecation-warnings' in the project's
project.conf