[Java] rename config ray.redis.address to ray.address (#10772)

java/runtime/src/main/resources/ray.default.conf

@@ -7,6 +7,10 @@ ray {
   // Basic configurations
   // ----------------------
 
+  // Address of the Ray cluster to connect to.
+  // If not provided, a new Ray cluster will be created.
+  address: ""
+
   // Run mode, available options are:
   //
   // `SINGLE_PROCESS`: Ray is running in one single Java process, without Raylet backend,
@@ -67,10 +71,6 @@ ray {
   // Redis configurations
   // ----------------------
   redis {
-    // The address of the redis server to connect, in format `ip:port`.
-    // If not provided, Ray processes will be started locally, including
-    // Redis server, Raylet and object store.
-    address: ""
     // If `redis.server` isn't provided, which port we should use to start redis server.
     // If `head-port` is not provided, it will be generated randomly.
     // head-port: 6379