Report HTTP response contents in the exception

Author: Kamran Khan

src/ResourceManager/Compute/Commands.Compute/Extension/AzureDiskEncryption/SetAzureDiskEncryptionExtension.cs

@@ -469,7 +469,10 @@ public override void ExecuteCmdlet()
 
                     if (!extensionPushResult.Response.IsSuccessStatusCode)
                     {
-                        ThrowTerminatingError(new ErrorRecord(new ApplicationException(string.Format(CultureInfo.CurrentUICulture, "Installation failed for extension {0}", parameters.VirtualMachineExtensionType)),
+                        ThrowTerminatingError(new ErrorRecord(new ApplicationException(string.Format(CultureInfo.CurrentUICulture,
+                                                                                       "Installation failed for extension {0} with error {1}",
+                                                                                       parameters.VirtualMachineExtensionType,
+                                                                                       extensionPushResult.Response.Content.ReadAsStringAsync().GetAwaiter().GetResult())),
                                                               "InvalidResult",
                                                               ErrorCategory.InvalidResult,
                                                               null));