SEBA-227 do not validate deleted objects

Change-Id: I8de623f0904c5fd52296acf02dd98379065c11bc
diff --git a/lib/xos-genx/xosgenx/targets/django.xtarget b/lib/xos-genx/xosgenx/targets/django.xtarget
index ab67936..1c06de3 100644
--- a/lib/xos-genx/xosgenx/targets/django.xtarget
+++ b/lib/xos-genx/xosgenx/targets/django.xtarget
@@ -99,7 +99,8 @@
       except AttributeError:
           pass
 
-      self.full_clean()
+      if not self.deleted:
+          self.full_clean()
 
       {% for policy,error in xproto_validations(m.options) %}
       policy_{{policy}}_validator(self, None)