Address some pylint issues (#1155)

* Address cyclic-import.

* Address redefined-builtin.

* Address redefined-argument-from-local.

* Address many redefined-outer-name.

* Address pointless-string-statement.

* No longer needed due to separate bugfix.

* Address useless-return.

* Address possibly-used-before-assignment.

* Add TODOs.

* Address super-init-not-called.

* Address function-redefined.

* Address unspecified-encoding.

* Clean up more imports.

plugins/modules/docker_compose_v2.py

@@ -499,6 +499,8 @@ class ServicesManager(BaseComposeManager):
             result = self.cmd_restart()
         elif self.state == "absent":
             result = self.cmd_down()
+        else:
+            raise AssertionError("Unexpected state")
 
         result["containers"] = self.list_containers()
         result["images"] = self.list_images()