add gadgets for instance detail page

data/instance_configuration.json

+{
+  "portal_type_source": "Hosting Subscription",
+  "portal_type_title": "service",
+  "portal_type_fields": "service_fieldlist",
+  "form": true,
+  "view": "web_view",
+  "property_dict": {
+    "initial_query_url_identifier": "_id",
+    "dynamic_children": [0],
+    "requires_authentication": true,
+    "depends_on": "login_state"
+  },
+  "scheme": [
+    {
+      "position": "left",
+      "fieldlist": [
+        {"field": "reference", "overrides": {"properties": {"editable": false}}},
+        {"field": "title", "overrides": {"properties": {"editable": false}}},
+        {"field": "source_reference", "overrides": {"properties": {"editable": false}}},
+        {"field": "status", "overrides": {"properties": {"editable": false}}}
+      ]
+    },
+    {
+      "position": "center",
+      "fieldlist": [
+        {"type": "a", "direct": {}, "attributes": {"data-external":true}, "logic":{"setters": ["href", "text"], "setValue":"url_string"}},
+        {"field": "text_content", "overrides": {"widget": {"title": "Instance XML Recipe", "title_i18n": "portal_type_dict.service_dict.text_dict.recipe"}}}
+      ]
+    }
+  ],
+  "children": [
+    {
+      "generate": "widget",
+      "type": "form",
+      "class_list": "responsive",
+      "property_dict": {
+        "editable": true,
+        "secure": "default",
+        "secret_hash": "foo",
+        "public_key": "6Ldpb-oSAAAAAGwriKpk4ol1n4yjN_as6M4xv0zA"
+      },
+      "children": []
+    }
+  ]
+}

data/instance_connection.json

+{
+  "portal_type_source": "Hosting Subscription",
+  "portal_type_title": "service",
+  "portal_type_fields": "service_fieldlist",
+  "portal_type_mapper": "subscriptions",
+  "form": true,
+  "view": "web_view",
+  "property_dict": {
+    "initial_query_url_identifier": "_id",
+    "dynamic_children": [1],
+    "wrap_gadget": 2,
+    "caption": {
+      "slot": 1,
+      "text": "Connection parameters",
+      "text_i18n": "portal_type_dict.service_dict.text_dict.connection_param"
+    }
+  },
+  "scheme": [
+    {
+      "position": "header",
+      "fieldlist": [
+        {"field": "connection_url", "show": true, "priority": 1},
+        {"field": "connection_backend_url", "show": true, "priority": 2},
+        {"field": "connection_password", "show": true, "priority": 6}
+      ]
+    },
+    {
+      "position": "body",
+      "fieldlist": [
+        {"field": "connection_url", "show": true, "priority": 1},
+        {"field": "connection_backend_url", "show": true, "priority": 2},
+        {"field": "connection_password", "show": true, "priority": 6}
+      ]
+    }
+  ],
+  "children": [{
+    "generate": "widget",
+    "type": "table",
+    "class_list": "table-stroke ui-responsive",
+    "property_dict": {
+      "mode": "columntoggle",
+      "toggle_popup": false,
+      "wrap": "both",
+      "top_grid": 1,
+      "bottom_grid": 1
+    },
+    "children": []
+    }
+  ]
+}