Add go-openapi dependencies and update Godeps

vendor/github.com/asaskevich/govalidator/error.go

@@ -0,0 +1,31 @@
+package govalidator
+
+// Errors is an array of multiple errors and conforms to the error interface.
+type Errors []error
+
+// Errors returns itself.
+func (es Errors) Errors() []error {
+	return es
+}
+
+func (es Errors) Error() string {
+	var err string
+	for _, e := range es {
+		err += e.Error() + ";"
+	}
+	return err
+}
+
+// Error encapsulates a name, an error and whether there's a custom error message or not.
+type Error struct {
+	Name                     string
+	Err                      error
+	CustomErrorMessageExists bool
+}
+
+func (e Error) Error() string {
+	if e.CustomErrorMessageExists {
+		return e.Err.Error()
+	}
+	return e.Name + ": " + e.Err.Error()
+}