Update heketi dependencies to sha@558b29266ce0a873991ecfb3edc41a668a998514.

Fixes #
https://github.com/kubernetes/kubernetes/issues/70802

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/github.com/go-ozzo/ozzo-validation/string.go

@@ -0,0 +1,48 @@
+// Copyright 2016 Qiang Xue. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package validation
+
+import "errors"
+
+type stringValidator func(string) bool
+
+// StringRule is a rule that checks a string variable using a specified stringValidator.
+type StringRule struct {
+	validate stringValidator
+	message  string
+}
+
+// NewStringRule creates a new validation rule using a function that takes a string value and returns a bool.
+// The rule returned will use the function to check if a given string or byte slice is valid or not.
+// An empty value is considered to be valid. Please use the Required rule to make sure a value is not empty.
+func NewStringRule(validator stringValidator, message string) *StringRule {
+	return &StringRule{
+		validate: validator,
+		message:  message,
+	}
+}
+
+// Error sets the error message for the rule.
+func (v *StringRule) Error(message string) *StringRule {
+	return NewStringRule(v.validate, message)
+}
+
+// Validate checks if the given value is valid or not.
+func (v *StringRule) Validate(value interface{}) error {
+	value, isNil := Indirect(value)
+	if isNil || IsEmpty(value) {
+		return nil
+	}
+
+	str, err := EnsureString(value)
+	if err != nil {
+		return err
+	}
+
+	if v.validate(str) {
+		return nil
+	}
+	return errors.New(v.message)
+}