Added valid link to created PR (#15119)

Author: Anatoly Bolshakov

ci/courtesy-push/open-courtesy-push-pull-request.js

@@ -1,5 +1,12 @@
 const azdev = require('azure-devops-node-api');
 
+/**
+ * Gets PR's link from pull request id - since url property of GitPullRequest returns JSON
+ */
+function getPullRequestLink(repositoryWebUrl, pullRequestId) {
+    return `${repositoryWebUrl}/pullrequest/${pullRequestId}`;
+}
+
 const orgUrl = "https://dev.azure.com/mseng";
 const token = process.env.TOKEN;
 if (!token) {
@@ -27,9 +34,10 @@ console.log('Getting api');
 connection.getGitApi().then(gitApi => {
     console.log('Creating PR');
     gitApi.createPullRequest(pullRequestToCreate, azureDevOpsRepoId, project).then(res => {
-        console.log(`Created PR ${res.url}`);
-        const prLink = res.url || 'https://dev.azure.com/mseng/AzureDevOps/_git/AzureDevOps/pullrequests?_a=active&createdBy=fe107a2d-fcce-6506-8e35-5554dbe120fd';
-        console.log(`##vso[task.setvariable variable=PrLink]${prLink}`);
+        const prLink = getPullRequestLink(res.repository.webUrl, res.pullRequestId);
+        console.log(`Created PR ${prLink}`);
+        const prLinkRes = prLink || 'https://dev.azure.com/mseng/AzureDevOps/_git/AzureDevOps/pullrequests?_a=active&createdBy=fe107a2d-fcce-6506-8e35-5554dbe120fd';
+        console.log(`##vso[task.setvariable variable=PrLink]${prLinkRes}`);
     }).catch(err => {
         console.log(err);
         throw err;