Deprecate migrate's MultiError in favor of github.com/hashicorp/go-multierror

Author: dhui

migrate.go

@@ -950,7 +950,7 @@ func (m *Migrate) unlock() error {
 // if a prevErr is not nil.
 func (m *Migrate) unlockErr(prevErr error) error {
 	if err := m.unlock(); err != nil {
-		return NewMultiError(prevErr, err)
+		return multierror.Append(prevErr, err)
 	}
 	return prevErr
 }

util.go

@@ -8,11 +8,16 @@ import (
 )
 
 // MultiError holds multiple errors.
+//
+// Deprecated: Use github.com/hashicorp/go-multierror instead
 type MultiError struct {
 	Errs []error
 }
 
 // NewMultiError returns an error type holding multiple errors.
+//
+// Deprecated: Use github.com/hashicorp/go-multierror instead
+//
 func NewMultiError(errs ...error) MultiError {
 	compactErrs := make([]error, 0)
 	for _, e := range errs {