Disable mandatory ECP support for attestion

testing/tests/tnc/tnccs-20-pts-no-ecc/hosts/dave/etc/strongswan.conf

@@ -0,0 +1,25 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes md5 sha1 sha2 hmac gmp pem pkcs1 random nonce x509 revocation stroke kernel-netlink socket-default eap-identity eap-md5 eap-ttls eap-tnc tnc-imc tnc-tnccs tnccs-20 updown
+  multiple_authentication=no
+  plugins {
+    eap-tnc {
+      protocol = tnccs-2.0
+    }
+    tnc-imc {
+      preferred_language = de
+    }
+  }
+}
+
+libimcv {
+  plugins {
+    imc-os {
+      push_info = no
+    }
+    imc-attestation {
+      mandatory_dh_groups = no
+    }
+  }
+}