Replace --redis-address with --address in test, docs, tune, rllib (#5602)

* wip

* add tests and tune

* add ci

* test fix

* lint

* fix tests

* wip

* sugar dep

python/ray/node.py

@@ -201,6 +201,11 @@ class Node(object):
         """Get the cluster Redis address."""
         return self._node_ip_address
 
+    @property
+    def address(self):
+        """Get the cluster address."""
+        return self._redis_address
+
     @property
     def redis_address(self):
         """Get the cluster Redis address."""