netconf UPDATE use timeout for DS lock

Fixes #1766

Author: michalvasko

src/netconf.c

@@ -578,7 +578,7 @@ np2srv_rpc_un_lock_cb(const struct lyd_node *rpc, struct np_user_sess *user_sess
 
     /* sysrepo API */
     if (!strcmp(rpc->schema->name, "lock")) {
-        r = sr_lock(user_sess->sess, NULL, 0);
+        r = sr_lock(user_sess->sess, NULL, np2srv.sr_timeout);
     } else {
         assert(!strcmp(rpc->schema->name, "unlock"));
         r = sr_unlock(user_sess->sess, NULL);