Update go vendoring

Signed-off-by: Evan Lezar <elezar@nvidia.com>

vendor/github.com/tsaikd/KDGoLib/errutil/ErrorObjectUtil.go

@@ -0,0 +1,88 @@
+package errutil
+
+import "encoding/json"
+
+// WalkFunc is a callback for WalkErrors
+type WalkFunc func(errcomp ErrorObject) (stop bool, err error)
+
+// WalkErrors walk from base error through all parents
+// return ErrorWalkLoop if detected loop
+func WalkErrors(base ErrorObject, walkFunc WalkFunc) (err error) {
+	if base == nil {
+		return
+	}
+
+	loopCheckMap := map[ErrorObject]bool{}
+	for base != nil {
+		if _, exist := loopCheckMap[base]; exist {
+			return ErrorWalkLoop.New(nil)
+		}
+		loopCheckMap[base] = true
+
+		stop, walkerr := walkFunc(base)
+		if walkerr != nil {
+			return walkerr
+		}
+		if stop {
+			return
+		}
+
+		base = base.Parent()
+	}
+
+	return
+}
+
+// Length count number of ErrorObject and all parents, return -1 if error
+func Length(base ErrorObject) int {
+	length := 0
+	if err := WalkErrors(base, func(errcomp ErrorObject) (stop bool, walkerr error) {
+		length++
+		return false, nil
+	}); err != nil {
+		return -1
+	}
+	return length
+}
+
+// AddParent add parent to errobj
+func AddParent(errobj ErrorObject, parent ErrorObject) error {
+	if errobj == nil || parent == nil {
+		return nil
+	}
+
+	// set parent if not exist
+	if errobj.Parent() == nil {
+		errobj.SetParent(parent)
+		return nil
+	}
+
+	// find oldest parent to set
+	base := errobj
+	if err := WalkErrors(base.Parent(), func(errcomp ErrorObject) (stop bool, walkerr error) {
+		// already in parent tree
+		if errcomp == parent {
+			base = nil
+			return true, nil
+		}
+		base = errcomp
+		return false, nil
+	}); err != nil {
+		return err
+	}
+
+	if base != nil {
+		base.SetParent(parent)
+	}
+
+	return nil
+}
+
+// MarshalJSON marshal error to json
+func MarshalJSON(errobj error) ([]byte, error) {
+	errjson, err := newJSON(1, errobj)
+	if errjson == nil || err != nil {
+		return []byte(""), err
+	}
+	return json.Marshal(errjson)
+}