add eq for python, update test case

modules/swagger-codegen/src/main/resources/python/model.mustache

@@ -113,5 +113,18 @@ class {{classname}}(object):
         For `print` and `pprint`
         """
         return self.to_str()
+
+    def __eq__(self, other): 
+        """
+        Returns true if both objects are equal
+        """
+        return self.__dict__ == other.__dict__
+
+    def __ne__(self, other):
+        """ 
+        Returns true if both objects are not equal
+        """
+        return not self == other
+
 {{/model}}
 {{/models}}