nat: prevent usage of ED nodes in EI code

Type: fix
Change-Id: I84d511c30eb5878a1867f5e9d2207a39d4f0926c
Signed-off-by: Klement Sekera <ksekera@cisco.com>
diff --git a/src/plugins/nat/test/test_nat44_ei.py b/src/plugins/nat/test/test_nat44_ei.py
index f5c5abe..cd1941a 100644
--- a/src/plugins/nat/test/test_nat44_ei.py
+++ b/src/plugins/nat/test/test_nat44_ei.py
@@ -3044,11 +3044,14 @@
             self.logger.error(ppp("Unexpected or invalid packet:", p))
             raise
 
-        err = self.statistics.get_err_counter(
-            '/err/nat44-ei-classify/next in2out')
+        if self.vpp_worker_count > 1:
+            node = "nat44-ei-handoff-classify"
+        else:
+            node = "nat44-ei-classify"
+
+        err = self.statistics.get_err_counter('/err/%s/next in2out' % node)
         self.assertEqual(err, 1)
-        err = self.statistics.get_err_counter(
-            '/err/nat44-ei-classify/next out2in')
+        err = self.statistics.get_err_counter('/err/%s/next out2in' % node)
         self.assertEqual(err, 1)
 
     def test_del_session(self):