Update pylint.yml

process exit of pylint to avoid always getting errors (pylint uses the output to show the error/message type)

python-packages/pylint.yml

@@ -4,8 +4,8 @@ pylint:
   image: $ACR_URL/python:3.8
   tags:
     - docker
-  allow_failure: true
   script:
     - source $VIRTUALENV_NAME/bin/activate
     - pip install pylint
-    - pylint -d C0301 $MODULE_FOLDER
+    - pip install pylint-exit
+    - pylint -d C0301 $MODULE_FOLDER || pylint-exit $?