testing: Load kdf plugin in all scenarios that require it

Once we use plugin-provided prf+() these won't work otherwise.

testing/tests/af-alg/alg-camellia/hosts/carol/etc/strongswan.conf

@@ -5,5 +5,5 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce pem pkcs1 af-alg gmp x509 revocation kernel-netlink curl socket-default updown vici
+  load = random nonce kdf pem pkcs1 af-alg gmp x509 revocation kernel-netlink curl socket-default updown vici
 }

testing/tests/af-alg/alg-camellia/hosts/moon/etc/strongswan.conf

@@ -5,5 +5,5 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce pem pkcs1 af-alg gmp x509 revocation kernel-netlink curl socket-default updown vici
+  load = random nonce kdf pem pkcs1 af-alg gmp x509 revocation kernel-netlink curl socket-default updown vici
 }

testing/tests/af-alg/rw-cert/hosts/carol/etc/strongswan.conf

@@ -5,7 +5,7 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce test-vectors pem pkcs1 af-alg gmp x509 revocation curl ctr ccm gcm kernel-netlink socket-default updown vici
+  load = random nonce kdf test-vectors pem pkcs1 af-alg gmp x509 revocation curl ctr ccm gcm kernel-netlink socket-default updown vici
   integrity_test = yes
   crypto_test {
     on_add = yes

testing/tests/af-alg/rw-cert/hosts/dave/etc/strongswan.conf

@@ -5,7 +5,7 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce test-vectors aes des sha1 sha2 md5 pem pkcs1 gmp x509 revocation curl hmac xcbc ctr ccm gcm kernel-netlink socket-default updown vici
+  load = random nonce kdf test-vectors aes des sha1 sha2 md5 pem pkcs1 gmp x509 revocation curl hmac kdf xcbc ctr ccm gcm kernel-netlink socket-default updown vici
   integrity_test = yes
   crypto_test {
     on_add = yes

testing/tests/af-alg/rw-cert/hosts/moon/etc/strongswan.conf

@@ -5,7 +5,7 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce test-vectors pem pkcs1 af-alg gmp x509 revocation curl ctr ccm gcm kernel-netlink socket-default updown vici
+  load = random nonce kdf test-vectors pem pkcs1 af-alg gmp x509 revocation curl ctr ccm gcm kernel-netlink socket-default updown vici
   integrity_test = yes
   crypto_test {
     on_add = yes