Mark asyncBatchAnalyze as long running operation.

specification/cognitiveservices/data-plane/ComputerVision/stable/v2.0/Ocr.json

@@ -114,6 +114,7 @@
     "/read/core/asyncBatchAnalyze": {
       "post": {
         "description": "Use this interface to get the result of a Read operation, employing the state-of-the-art Optical Character Recognition (OCR) algorithms optimized for text-heavy documents. When you use the Read File interface, the response contains a field called \"Operation-Location\". The \"Operation-Location\" field contains the URL that you must use for your \"Read Operation Result\" operation to access OCR results.​",
+        "x-ms-long-running-operation": true,
         "operationId": "BatchReadFile",
         "parameters": [
           {