[SpringCloud] Update LiveTest unit test case (#27773)

Author: lijinpei2008

src/SpringCloud/LiveTests/SpringCloud.Autorest/TestLiveScenarios.ps1

@@ -39,7 +39,7 @@ Invoke-LiveTestScenario -Name "Create Spring Cloud App Deployment Instance" -Des
     $springCloudInstance = New-AzSpringCloud -ResourceGroupName $rgName -Name $springCloudServiceName -Location $location -SkuTier "Basic" -SkuName "B0"
     $appInstance = New-AzSpringCloudApp -ResourceGroupName $rgName -ServiceName $springCloudServiceName -Name $appName
     $jarSource = New-AzSpringCloudAppDeploymentJarUploadedObject -RuntimeVersion "Java_8"
-    $deployment = New-AzSpringCloudAppDeployment -ResourceGroupName $rgName -ServiceName $springCloudServiceName -AppName $appName -DeploymentName $deploymentName -Source $jarSource -EnvironmentVariable @{"env" = "prod"}
+    $deployment = New-AzSpringCloudAppDeployment -ResourceGroupName $rgName -ServiceName $springCloudServiceName -AppName $appName -DeploymentName $deploymentName -Source $jarSource -EnvironmentVariable @{"env" = "prod"} -Name default
 
     Assert-AreEqual $appName $appInstance.Name
 }