Make Pylint more flexible with a YAML-based config

See also: pytools#4 (closed)

This adds support for a YAML-based config file format for Pylint with a thin wrapper script that translates the YAML file into command line arguments.

This change also modifies prepare-and-run-pylint.sh to look for YAML configs. It looks for a .pylintrc.yml, and if it does not find it, it downloads the global config file from ci-support. It also supports local configurations via the file .pylintrc-local.yml.

prepare-and-run-pylint.sh

@@ -21,7 +21,7 @@ if ! test -f .pylintrc.yml; then
   curl -o .pylintrc.yml https://gitlab.tiker.net/inducer/ci-support/raw/pylint-flexible-config/.pylintrc-default.yml
 fi
 
-PYLINT_RUNNER_ARGS="--yaml-rcfile=.pylintr.yml"
+PYLINT_RUNNER_ARGS="--yaml-rcfile=.pylintrc.yml"
 
 if test -f .pylintrc-local.yml; then
   PYLINT_RUNNER_ARGS="$PYLINT_RUNNER_ARGS --yaml-rcfile=.pylintrc-local.yml"