[ROBOT] Add robot to nodeports waivers list

Issue-ID: INT-1720
Signed-off-by: Michal Jagiello <michal.jagiello@t-mobile.pl>
Change-Id: I478b2e12de15cda063044b6334be9e35ccfecae0
diff --git a/waivers/check_certificates/nodeports_xfail.txt b/waivers/check_certificates/nodeports_xfail.txt
index 5c08010..43bb131 100644
--- a/waivers/check_certificates/nodeports_xfail.txt
+++ b/waivers/check_certificates/nodeports_xfail.txt
@@ -1,2 +1,3 @@
 # Expected failure list for certificates associated to nodeports
 666 # foo example nodeport
+robot