session: update due to clib_socket refactoring

After the clib_socket_init syntax changed, the behavior of VCL
socket creation was broken. This patch introduces app_namespace_add_del_v4
to address the behavioral change.

Type: refactor

Change-Id: Ice016bdb372233fd3317f166d45625e086e9b4df
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
diff --git a/test/asf/test_tls.py b/test/asf/test_tls.py
index 68107f7..89ee450 100644
--- a/test/asf/test_tls.py
+++ b/test/asf/test_tls.py
@@ -83,10 +83,10 @@
             table_id += 1
 
         # Configure namespaces
-        self.vapi.app_namespace_add_del(
+        self.vapi.app_namespace_add_del_v4(
             namespace_id="0", sw_if_index=self.loop0.sw_if_index
         )
-        self.vapi.app_namespace_add_del(
+        self.vapi.app_namespace_add_del_v4(
             namespace_id="1", sw_if_index=self.loop1.sw_if_index
         )