added tnc/tnccs-20-pdp scenario

testing/tests/tnc/tnccs-20-pdp/hosts/carol/etc/strongswan.conf

@@ -0,0 +1,18 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random x509 revocation hmac stroke kernel-netlink socket-default eap-identity eap-md5 eap-ttls eap-tnc tnc-imc tnc-tnccs tnccs-20 updown
+  plugins {
+    eap-tnc {
+      protocol = tnccs-2.0
+    }
+  }
+}
+
+libimcv {
+  plugins {
+    imc-test {
+      command = allow
+    }
+  }
+}