Updates the used public rpki-caches for testing environment

Motivation
  - get pipeline checks running

How:
  - find valid rpki-cache which runs also rtr
  - edit url in live_tests

Author: Nimuedaertya

tests/test_dynamic_groups.c

@@ -24,8 +24,8 @@ int main(void)
 	//create a TCP transport socket
 	int retval = 0;
 	struct tr_socket tr_tcp;
-	char tcp_host[] = "rpki-validator.realmv6.org";
-	char tcp_port[] = "8283";
+	char tcp_host[] = "rpki-cache.netd.cs.tu-dresden.de";
+	char tcp_port[] = "3323";
 
 	struct tr_tcp_config tcp_config = {
 		tcp_host, //IP

tests/test_live_validation.c

@@ -57,12 +57,12 @@ int main(void)
 	/* These variables are not in the global scope
 	 * because it would cause warnings about discarding constness
 	 */
-	char RPKI_CACHE_HOST[] = "rpki-validator.realmv6.org";
-	char RPKI_CACHE_POST[] = "8283";
+	char RPKI_CACHE_HOST[] = "rpki-cache.netd.cs.tu-dresden.de";
+	char RPKI_CACHE_PORT[] = "3323";
 
 	/* create a TCP transport socket */
 	struct tr_socket tr_tcp;
-	struct tr_tcp_config tcp_config = {RPKI_CACHE_HOST, RPKI_CACHE_POST, NULL, NULL, NULL, 0};
+	struct tr_tcp_config tcp_config = {RPKI_CACHE_HOST, RPKI_CACHE_PORT, NULL, NULL, NULL, 0};
 	struct rtr_socket rtr_tcp;
 	struct rtr_mgr_group groups[1];