Update reflectwalk to fix failing tests

As part of working on ResourceConfig.DeepCopy, Equal I updated
reflectwalk (to fix some issues in the new functions) but this
introduced more issues in other parts of Terraform. This update fixes
those.

config/interpolate_walk_test.go

@@ -179,6 +179,7 @@ func TestInterpolationWalker_replace(t *testing.T) {
 			return tc.Value, nil
 		}
 
+		t.Run(fmt.Sprintf("walk-%d", i), func(t *testing.T) {
 			w := &interpolationWalker{F: fn, Replace: true}
 			if err := reflectwalk.Walk(tc.Input, w); err != nil {
 				t.Fatalf("err: %s", err)
@@ -187,5 +188,6 @@ func TestInterpolationWalker_replace(t *testing.T) {
 			if !reflect.DeepEqual(tc.Input, tc.Output) {
 				t.Fatalf("%d: bad:\n\nexpected:%#v\ngot:%#v", i, tc.Output, tc.Input)
 			}
+		})
 	}
 }

vendor/github.com/mitchellh/reflectwalk/reflectwalk.go

@@ -76,6 +76,14 @@ func Walk(data, walker interface{}) (err error) {
 }
 
 func walk(v reflect.Value, w interface{}) (err error) {
+	// We preserve the original value here because if it is an interface
+	// type, we want to pass that directly into the walkPrimitive, so that
+	// we can set it.
+	originalV := v
+	if v.Kind() == reflect.Interface {
+		v = v.Elem()
+	}
+
 	// Determine if we're receiving a pointer and if so notify the walker.
 	pointer := false
 	if v.Kind() == reflect.Ptr {
@@ -96,14 +104,6 @@ func walk(v reflect.Value, w interface{}) (err error) {
 		}()
 	}
 
-	// We preserve the original value here because if it is an interface
-	// type, we want to pass that directly into the walkPrimitive, so that
-	// we can set it.
-	originalV := v
-	if v.Kind() == reflect.Interface {
-		v = v.Elem()
-	}
-
 	k := v.Kind()
 	if k >= reflect.Int && k <= reflect.Complex128 {
 		k = reflect.Int
@@ -143,12 +143,6 @@ func walkMap(v reflect.Value, w interface{}) error {
 	for _, k := range v.MapKeys() {
 		kv := v.MapIndex(k)
 
-		// if the map value type is an interface, we need to extract the Elem
-		// for the next call to walk
-		if kv.Kind() == reflect.Interface {
-			kv = kv.Elem()
-		}
-
 		if mw, ok := w.(MapWalker); ok {
 			if err := mw.MapElem(v, k, kv); err != nil {
 				return err
@@ -208,12 +202,6 @@ func walkSlice(v reflect.Value, w interface{}) (err error) {
 	for i := 0; i < v.Len(); i++ {
 		elem := v.Index(i)
 
-		// if the value type is an interface, we need to extract the Elem
-		// for the next call to walk
-		if elem.Kind() == reflect.Interface {
-			elem = elem.Elem()
-		}
-
 		if sw, ok := w.(SliceWalker); ok {
 			if err := sw.SliceElem(i, elem); err != nil {
 				return err

vendor/vendor.json

@@ -1507,10 +1507,10 @@
 			"revision": "6e6954073784f7ee67b28f2d22749d6479151ed7"
 		},
 		{
-			"checksumSHA1": "Qfbnn/PnYNR2ZHraUeHTxT4H7lM=",
+			"checksumSHA1": "5fFCVadmQVH6jqnB6Zd739s28QM=",
 			"path": "github.com/mitchellh/reflectwalk",
-			"revision": "2d53f44828cae4c770d745a3560e37d3356774a6",
-			"revisionTime": "2016-09-27T21:55:38Z"
+			"revision": "84fc159ad78a797bb094a1e0c364392d837e1cd8",
+			"revisionTime": "2016-09-28T02:14:22Z"
 		},
 		{
 			"checksumSHA1": "/iig5lYSPCL3C8J7e4nTAevYNDE=",