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/module_utils/_api/context/context.py

@@ -133,7 +133,7 @@ class Context(object):
 
         metadata = {}
         try:
-            with open(meta_file) as f:
+            with open(meta_file, "rt", encoding="utf-8") as f:
                 metadata = json.load(f)
         except (OSError, KeyError, ValueError) as e:
             # unknown format
@@ -189,7 +189,7 @@ class Context(object):
         meta_dir = get_meta_dir(self.name)
         if not os.path.isdir(meta_dir):
             os.makedirs(meta_dir)
-        with open(get_meta_file(self.name), "w") as f:
+        with open(get_meta_file(self.name), "wt", encoding="utf-8") as f:
             f.write(json.dumps(self.Metadata))
 
         tls_dir = get_tls_dir(self.name)