Doc: Fix configuration API

Change-Id: Ieff5200c220376f5927835f46c1b0a5a4f34052e

api-ref/source/parameters.yaml

@@ -273,8 +273,8 @@ databases:
   type: array
 datastore:
   description: |
-    Data store assigned to the configuration group.
-    Required if you did not configure the default data store.
+    Data store type and version assigned to the configuration group.
+    Required if the default data store is not configured.
   in: body
   required: true
   type: string

api-ref/source/samples/config-group-create-request.json

@@ -1,11 +1,12 @@
 {
     "configuration": {
+        "name": "group1",
         "datastore": {
-                "type": "mysql"
+            "type": "mysql",
+            "version": "5.7.29"
         },
         "values": {
-                "sync_binlog": 1
-        },
-        "name": "group1"
+            "connect_timeout": 200
+        }
     }
 }

api-ref/source/samples/config-group-create-response.json

@@ -1,14 +1,16 @@
 {
-    "updated": "2015-07-01T16:38:27",
-    "name": "group1",
-    "created": "2015-07-01T16:38:27",
-    "instance_count": 0,
-    "values": {
-        "sync_binlog": 1
-    },
-    "datastore_version_id": "2dc7faa0-efff-4c2b-8cff-bcd949c518a5",
-    "id": "2aa51628-5c42-4086-8682-137caffd2ba6",
-    "datastore_name": "mysql",
-    "datastore_version_name": "5.6",
-    "description": null
-}
+    "configuration": {
+        "created": "2020-06-16T10:40:50",
+        "updated": "2020-06-16T10:40:50",
+        "datastore_name": "mysql",
+        "datastore_version_id": "cf91aa9a-2192-4ec4-b7ce-5cac3b1e7dbe",
+        "datastore_version_name": "5.7.29",
+        "description": null,
+        "id": "9dcfca0b-d181-4b36-bbf0-09bc47b103ab",
+        "instance_count": 0,
+        "name": "group1",
+        "values": {
+            "connect_timeout": 200
+        }
+    }
+}