tests: use v3 version of session sdl dump api in ip6 test

- session_sdl_v2_dump api command is deprecated

Type: fix

Change-Id: I4f7a140e7e39fae8076caa54fd8bfb0c755c6767
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
diff --git a/test/asf/test_session_sdl.py b/test/asf/test_session_sdl.py
index 952ad10..53301f7 100644
--- a/test/asf/test_session_sdl.py
+++ b/test/asf/test_session_sdl.py
@@ -234,7 +234,7 @@
             self.create_rule(rmt=self.loop1.local_ip6 + "/128", action_index=0, tag="")
         )
         self.apply_rules(rules, is_add=1, appns_index=0)
-        filter = self.vapi.session_sdl_v2_dump()
+        filter = self.vapi.session_sdl_v3_dump()
         self.assertEqual(filter[0].rmt, IPv6Network(self.loop1.local_ip6 + "/128"))
 
         error = self.vapi.cli_return_response(client_cmd)