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/tests/conftest.py

@@ -105,7 +105,7 @@ def _ray_start_cluster(**kwargs):
     for _ in range(num_nodes):
         remote_nodes.append(cluster.add_node(**init_kwargs))
     if do_init:
-        ray.init(redis_address=cluster.redis_address)
+        ray.init(address=cluster.address)
     yield cluster
     # The code after the yield will run as teardown code.
     ray.shutdown()
@@ -158,12 +158,12 @@ def call_ray_start(request):
         subprocess.check_output(command_args, stderr=subprocess.STDOUT))
     # Get the redis address from the output.
     redis_substring_prefix = "redis_address=\""
-    redis_address_location = (
+    address_location = (
         out.find(redis_substring_prefix) + len(redis_substring_prefix))
-    redis_address = out[redis_address_location:]
-    redis_address = redis_address.split("\"")[0]
+    address = out[address_location:]
+    address = address.split("\"")[0]
 
-    yield redis_address
+    yield address
 
     # Disconnect from the Ray cluster.
     ray.shutdown()
@@ -182,7 +182,7 @@ def two_node_cluster():
     for _ in range(2):
         remote_node = cluster.add_node(
             num_cpus=1, _internal_config=internal_config)
-    ray.init(redis_address=cluster.redis_address)
+    ray.init(address=cluster.address)
     yield cluster, remote_node
 
     # The code after the yield will run as teardown code.