checkpoint radius client work

ipa-python/ipavalidate.py

@@ -96,3 +96,4 @@ def path(text, notEmpty=False):
         return 1
 
     return 0
+

ipa-python/radius_client.py

@@ -0,0 +1,7 @@
+from ipa.entity import Entity
+
+class RadiusClient(Entity):
+
+    def __init2__(self):
+        pass
+