Added pylint and pylint-report targets. (#8222)

* Added pylint and pylint-report targets.

* Dummy commit.

* Dummy commit.

* Dummy commit.

* Final cleanup.

* Extended pylint checks to all directories currently containing our (non-vendored) python code.

* Switched to custom devops repo branch for testing.

* Dummy commit.

* Final cleanup.

Author: wknapik

package.json

@@ -30,6 +30,8 @@
     "test-security": "npm run check_security && npm run audit_deps && node ./build/commands/scripts/commands.js start --enable_brave_update --network_log --user_data_dir_name=brave-network-test",
     "tslint": "tslint --project tsconfig-lint.json \"components/**/*.{ts,tsx}\"",
     "pep8": "pycodestyle --max-line-length 120 -r script",
+    "pylint": "pylint -j0 -ry build components installer script tools",
+    "pylint-report": "pylint -j0 -fparseable -rn --exit-zero build components installer script tools >pylint-report.txt",
     "web-ui-gen-grd": "node components/webpack/gen-webpack-grd",
     "web-ui": "webpack --config components/webpack/webpack.config.js --progress --colors",
     "build-storybook": "build-storybook -c .storybook -o .storybook-out",