Enable more pylint rules and fix reported issues. (#30539)

* Enable pylint unreachable test.
* Enable pylint suppressed-message test.
* Enable pylint redundant-unittest-assert test.
* Enable pylint bad-open-mode test.
* Enable pylint signature-differs test.
* Enable pylint unnecessary-pass test.
* Enable pylint unnecessary-lambda test.
* Enable pylint raising-bad-type test.
* Enable pylint logging-not-lazy test.
* Enable pylint logging-format-interpolation test.
* Enable pylint useless-else-on-loop test.

lib/ansible/modules/monitoring/monit.py

@@ -111,8 +111,7 @@ def main():
             if parts != '':
                 return parts
 
-        else:
-            return ''
+        return ''
 
     def run_command(command):
         """Runs a monit command, and returns the new status."""