Fix inconsistency between model name and file name in python client (#7684)

Fixes issue #7357 using the same fix as #4958

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java

@@ -456,33 +456,9 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
 
     @Override
     public String toModelFilename(String name) {
-        name = sanitizeName(name); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
-        // remove dollar sign
-        name = name.replaceAll("$", "");
-
-        // model name cannot use reserved keyword, e.g. return
-        if (isReservedWord(name)) {
-            LOGGER.warn(name + " (reserved word) cannot be used as model filename. Renamed to " + underscore(dropDots("model_" + name)));
-            name = "model_" + name; // e.g. return => ModelReturn (after camelize)
-        }
-
-        // model name starts with number
-        if (name.matches("^\\d.*")) {
-            LOGGER.warn(name + " (model name starts with number) cannot be used as model name. Renamed to " + underscore("model_" + name));
-            name = "model_" + name; // e.g. 200Response => Model200Response (after camelize)
-        }
-
-        if (!StringUtils.isEmpty(modelNamePrefix)) {
-            name = modelNamePrefix + "_" + name;
-        }
-
-        if (!StringUtils.isEmpty(modelNameSuffix)) {
-            name = name + "_" + modelNameSuffix;
-        }
-
         // underscore the model file name
         // PhoneNumber => phone_number
-        return underscore(dropDots(name));
+        return underscore(dropDots(toModelName(name)));
     }
 
     @Override