[azure-arm] retry cleanup individual resources on error

builder/azure/arm/step_delete_resource_group.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"github.com/hashicorp/packer/builder/azure/common/constants"
+	retry "github.com/hashicorp/packer/common"
 	"github.com/hashicorp/packer/helper/multistep"
 	"github.com/hashicorp/packer/packer"
 )
@@ -93,11 +94,19 @@ func (s *StepDeleteResourceGroup) deleteDeploymentResources(ctx context.Context,
 			resourceType,
 			resourceName))
 
+		err := retry.Retry(10, 600, 10, func(attempt uint) (bool, error) {
 			err := deleteResource(ctx, s.client,
 				resourceType,
 				resourceName,
 				resourceGroupName)
+			if err != nil {
 				s.reportIfError(err, resourceName)
+				return false, nil
+			}
+
+			return true, nil
+		})
+
 		if err = deploymentOperations.Next(); err != nil {
 			return err
 		}