testing: Migrated tnc scenarios to new default plugins

testing/tests/tnc/tnccs-20-ev-pt-tls/hosts/dave/etc/strongswan.conf

@@ -18,5 +18,5 @@ libtls {
 }
 
 pt-tls-client {
-  load = revocation constraints pem openssl curl nonce tnc-tnccs tnc-imc tnccs-20
+  load = revocation constraints pem openssl curl nonce openssl tnc-tnccs tnc-imc tnccs-20
 }