Update python and ruby clients.

Use `sanitizeName` to sanitize model name.

Author: geekerzp

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

@@ -199,7 +199,7 @@ public String toParamName(String name) {
 
     @Override
     public String toModelName(String name) {
-        name = name.replaceAll("\\W", "_");
+        name = sanitizeName(name);
 
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {

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

@@ -224,7 +224,7 @@ public String toParamName(String name) {
 
     @Override
     public String toModelName(String name) {
-        name = name.replaceAll("\\W", "_");
+        name = sanitizeName(name);
 
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {