fix config

opensearch-coord2/config.json

@@ -27,8 +27,8 @@
       "coordinating_only"
     ],
     "discovery_type": "single-node",
-    "discovery_seed_hosts": [],
-    "initial_master_nodes": [],
+    "discovery_seed_hosts": ["os-master", "os-data-1", "os-data-2"],
+    "initial_master_nodes": ["os-master"],
     "opensearch_heap": "2g",
     "plugins": [],
     "bootstrap_memory_lock": false,
@@ -43,15 +43,7 @@
     "cluster_name": "str",
     "node_name": "str",
     "node_roles": "list(str)",
-    "discovery_type": [
-      "str",
-      [
-        "single-node",
-        "zen",
-        "dns",
-        "ec2"
-      ]
-    ],
+    "discovery_type": "str",
     "discovery_seed_hosts": "list(str)",
     "initial_master_nodes": "list(str)",
     "opensearch_heap": "str",