Update sentinel tests for redis-client 0.14

It now emits an extra query to refresh the sentinel list.
Mocks need an update.

test/sentinel/sentinel_test.rb

@@ -74,12 +74,9 @@ def test_sentinel_failover
         commands[:s2] << [command, *args]
         case command
         when "get-master-addr-by-name"
-          ["127.0.0.1", sentinels[0][:port].to_s]
+          ["127.0.0.1", "6381"]
         when "sentinels"
-          [
-            # ["ip", "127.0.0.1", "port", sentinels[0][:port].to_s],
-            # ["ip", "127.0.0.1", "port", sentinels[1][:port].to_s],
-          ]
+          []
         else
           raise "Unexpected command #{[command, *args].inspect}"
         end
@@ -97,7 +94,7 @@ def test_sentinel_failover
     end
 
     assert_equal commands[:s1], [%w[get-master-addr-by-name master1]]
-    assert_equal commands[:s2], [%w[get-master-addr-by-name master1]]
+    assert_equal commands[:s2], [%w[get-master-addr-by-name master1], ["sentinels", "master1"]]
   end
 
   def test_sentinel_failover_prioritize_healthy_sentinel