[SEBA-126] Adding xproto support for min and max validators

Change-Id: I6141c678d88a894db2a86132bdbad4e9c6b31b2f
diff --git a/lib/xos-genx/xosgenx/targets/django.xtarget b/lib/xos-genx/xosgenx/targets/django.xtarget
index 631e8cd..ab67936 100644
--- a/lib/xos-genx/xosgenx/targets/django.xtarget
+++ b/lib/xos-genx/xosgenx/targets/django.xtarget
@@ -99,6 +99,8 @@
       except AttributeError:
           pass
 
+      self.full_clean()
+
       {% for policy,error in xproto_validations(m.options) %}
       policy_{{policy}}_validator(self, None)
       {% endfor %}