modules: update code to python3 (#10904)

* modules: update code to python3

* pamd: rollback changes

* add changelog frag

* fix/improve assignments using generators

* Update plugins/modules/launchd.py

Co-authored-by: Felix Fontein <felix@fontein.de>

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Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/modules/vertica_user.py

@@ -320,7 +320,7 @@ def main():
     roles = []
     if module.params['roles']:
         roles = module.params['roles'].split(',')
-        roles = filter(None, roles)
+        roles = [_f for _f in roles if _f]
     state = module.params['state']
     if state == 'locked':
         locked = True