yang choice case translator + whitebox fix

Change-Id: I96f1855bc71a002335946150b51e911ae6ac2fb2
diff --git a/utils/yangutils/src/test/resources/ChoiceCaseTranslator.yang b/utils/yangutils/src/test/resources/ChoiceCaseTranslator.yang
new file mode 100644
index 0000000..e8127ea
--- /dev/null
+++ b/utils/yangutils/src/test/resources/ChoiceCaseTranslator.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container food {
+       choice snack {
+           case sports-arena {
+               leaf pretzel {
+                   type string;
+               }
+               leaf beer {
+                   type string;
+               }
+           }
+           case late-night {
+               leaf chocolate {
+                   type string;
+               }
+           }
+       }
+    }
+}