change instance-erp5-input-schema.json without result json document change.

purpose: user has one choise instead of two choices in ui.
before change type field and server field were not connected
and user had to select type independently of server select.

software/erp5/instance-erp5-input-schema.json

 {
-  "$schema": "http://json-schema.org/draft-04/schema#",
+  "$schema": "http://json-schema.org/draft-07/schema#",
   "description": "Parameters to instantiate ERP5",
   "additionalProperties": false,
   "definitions": {
@@ -268,25 +268,6 @@
             "default": "/",
             "type": "string"
           },
-          "type": {
-            "description": "Storage type",
-            "enum": [
-              "zeo",
-              "neo"
-            ],
-            "type": "string"
-          },
-          "server": {
-            "description": "Instantiate a server. If missing, 'storage-dict' must contain the necessary properties to mount the ZODB. For ZEO, the partition reference is 'zodb'. For NEO, they are 'neo-0', 'neo-1', ...",
-            "anyOf": [
-              {
-                "$ref": "./instance-zeo-schema.json"
-              },
-              {
-                "$ref": "../neoppod/instance-neo-input-schema.json"
-              }
-            ]
-          },
           "storage-dict": {
             "description": "Storage configuration. For NEO, 'logfile' is automatically set (see https://lab.nexedi.com/nexedi/neoppod/blob/master/neo/client/component.xml for other settings).",
             "properties": {
@@ -300,8 +281,39 @@
               "type": "string"
             },
             "type": "object"
+          },
+          "type": true,
+          "server": true
+        },
+        "oneOf": [
+          {
+            "title": "zeo",
+            "properties": {
+              "type": {
+                "description": "Storage type",
+                "const": "zeo"
+              },
+              "server": {
+                "description": "Instantiate a server. If missing, 'storage-dict' must contain the necessary properties to mount the ZODB. The partition reference is 'zodb'.",
+                "$ref": "./instance-zeo-schema.json"
+              }
+
             }
           },
+          {
+            "title": "neo",
+            "properties": {
+              "type": {
+                "description": "Storage type",
+                "const": "neo"
+              },
+              "server": {
+                "description": "Instantiate a server. If missing, 'storage-dict' must contain the necessary properties to mount the ZODB. Partitions references are 'neo-0', 'neo-1', ...",
+                "$ref": "../neoppod/instance-neo-input-schema.json"
+              }
+            }
+          }
+        ],
         "additionalProperties": {
           "type": "string"
         },