PLT-6076 Adding viper libs for config file changes (#5871)

* Adding viper libs for config file changes

* Removing the old fsnotify lib

* updating some missing libs

vendor/github.com/spf13/viper/util_test.go

@@ -0,0 +1,55 @@
+// Copyright © 2016 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+// Viper is a application configuration system.
+// It believes that applications can be configured a variety of ways
+// via flags, ENVIRONMENT variables, configuration files retrieved
+// from the file system, or a remote key/value store.
+
+package viper
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestCopyAndInsensitiviseMap(t *testing.T) {
+
+	var (
+		given = map[string]interface{}{
+			"Foo": 32,
+			"Bar": map[interface{}]interface {
+			}{
+				"ABc": "A",
+				"cDE": "B"},
+		}
+		expected = map[string]interface{}{
+			"foo": 32,
+			"bar": map[string]interface {
+			}{
+				"abc": "A",
+				"cde": "B"},
+		}
+	)
+
+	got := copyAndInsensitiviseMap(given)
+
+	if !reflect.DeepEqual(got, expected) {
+		t.Fatalf("Got %q\nexpected\n%q", got, expected)
+	}
+
+	if _, ok := given["foo"]; ok {
+		t.Fatal("Input map changed")
+	}
+
+	if _, ok := given["bar"]; ok {
+		t.Fatal("Input map changed")
+	}
+
+	m := given["Bar"].(map[interface{}]interface{})
+	if _, ok := m["ABc"]; !ok {
+		t.Fatal("Input map changed")
+	}
+}