Vendor dependencies for azure backend

vendor/github.com/Azure/azure-sdk-for-go/management/errors.go

@@ -0,0 +1,36 @@
+package management
+
+import (
+	"encoding/xml"
+	"fmt"
+)
+
+// AzureError represents an error returned by the management API. It has an error
+// code (for example, ResourceNotFound) and a descriptive message.
+type AzureError struct {
+	Code    string
+	Message string
+}
+
+//Error implements the error interface for the AzureError type.
+func (e AzureError) Error() string {
+	return fmt.Sprintf("Error response from Azure. Code: %s, Message: %s", e.Code, e.Message)
+}
+
+// IsResourceNotFoundError returns true if the provided error is an AzureError
+// reporting that a given resource has not been found.
+func IsResourceNotFoundError(err error) bool {
+	azureErr, ok := err.(AzureError)
+	return ok && azureErr.Code == "ResourceNotFound"
+}
+
+// getAzureError converts an error response body into an AzureError instance.
+func getAzureError(responseBody []byte) error {
+	var azErr AzureError
+	err := xml.Unmarshal(responseBody, &azErr)
+	if err != nil {
+		return fmt.Errorf("Failed parsing contents to AzureError format: %v", err)
+	}
+	return azErr
+
+}