Zip Deploy content fix M141 (#8676)

* Update zipDeploy to include content-type (#8671)

* bump task version

Author: vincent1173

Tasks/AzureRmWebAppDeploymentV4/task.json

@@ -18,7 +18,7 @@
     "version": {
         "Major": 4,
         "Minor": 3,
-        "Patch": 7
+        "Patch": 8
     },
     "releaseNotes": "What's new in version 4.* (preview)<br />Supports Kudu Zip Deploy<br />Supports App Service Environments<br />Improved UI for discovering different App service types supported by the task<br/>Click [here](https://aka.ms/azurermwebdeployreadme) for more information.",
     "minimumAgentVersion": "2.104.1",

Tasks/AzureRmWebAppDeploymentV4/task.loc.json

@@ -18,7 +18,7 @@
   "version": {
     "Major": 4,
     "Minor": 3,
-    "Patch": 7
+    "Patch": 8
   },
   "releaseNotes": "ms-resource:loc.releaseNotes",
   "minimumAgentVersion": "2.104.1",

Tasks/Common/azure-arm-rest/azure-arm-app-service-kudu.ts

@@ -17,10 +17,10 @@ export class KuduServiceManagementClient {
         this._scmUri = scmUri;
     }
 
-    public async beginRequest(request: webClient.WebRequest, reqOptions?: webClient.WebRequestOptions): Promise<webClient.WebResponse> {
+    public async beginRequest(request: webClient.WebRequest, reqOptions?: webClient.WebRequestOptions, contentType?: string): Promise<webClient.WebResponse> {
         request.headers = request.headers || {};
         request.headers["Authorization"] = "Basic " + this._accesssToken;
-        request.headers['Content-Type'] = 'application/json; charset=utf-8';
+        request.headers['Content-Type'] = contentType || 'application/json; charset=utf-8';
 
         let retryCount = reqOptions && util.isNumber(reqOptions.retryCount) ? reqOptions.retryCount : 5;
 
@@ -445,7 +445,7 @@ export class Kudu {
         httpRequest.body = fs.createReadStream(webPackage);
 
         try {
-            let response = await this._client.beginRequest(httpRequest);
+            let response = await this._client.beginRequest(httpRequest, null, 'application/octet-stream');
             tl.debug(`ZIP Deploy response: ${JSON.stringify(response)}`);
             if(response.statusCode == 200) {
                 tl.debug('Deployment passed');