test: enable pylint warnings

Make pylint complain about warnings, not just errors. There are lots of
useful warnings and we generally do adhere to the coding-styles.

test/src/test_pylint.py

@@ -18,11 +18,10 @@ class TestPylint(test.TestBase, unittest.TestCase):
         #
 
         path = self.locate_test_checkout()
-        options = "--errors-only"
 
-        subprocess.run(f"find {path} -type f -name '*.py' | xargs pylint {options}",
+        subprocess.run(f"find {path} -type f -name '*.py' | xargs pylint",
                        shell=True, check=True)
-        subprocess.run(f"pylint {options}"
+        subprocess.run("pylint"
                        + f" {path}/assemblers/*"
                        + f" {path}/runners/*"
                        + f" {path}/sources/*"