[Azure Stack] Add scaleUnit and volumeLabel parameter to Disks_List (#8733)

* add scaleUnit and volumeLabel to Disks_List

* fix ref location

* update parameter description

Author: zyxyoshine

specification/azsadmin/resource-manager/compute/Microsoft.Compute.Admin/preview/2018-07-30-preview/Disks.json

@@ -44,6 +44,12 @@
           {
             "$ref": "Disks.json#/parameters/SourceSharePathParameter"
           },
+          {
+            "$ref": "Disks.json#/parameters/SourceScaleUnitParameter"
+          },
+          {
+            "$ref": "Disks.json#/parameters/SourceVolumeLabelParameter"
+          },
           {
             "$ref": "Disks.json#/parameters/DiskCountParameter"
           },
@@ -267,13 +273,29 @@
       "x-ms-parameter-location": "method"
     },
     "SourceSharePathParameter": {
-      "description": "The source share which the resource belongs to.",
+      "description": "The share which the resource belongs to.",
       "name": "sharePath",
       "in": "query",
       "required": false,
       "type": "string",
       "x-ms-parameter-location": "method"
     },
+    "SourceScaleUnitParameter": {
+      "description": "The scale unit which the resource belongs to.",
+      "name": "scaleUnit",
+      "in": "query",
+      "required": false,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "SourceVolumeLabelParameter": {
+      "description": "The volume label of the volume which the resource belongs to.",
+      "name": "volumeLabel",
+      "in": "query",
+      "required": false,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
     "DiskCountParameter": {
       "description": "The maximum number of disks to return.",
       "name": "count",