[ONOS-6695]supporting single quoted binary values

Change-Id: Icda3f064c5a2216938ae965d75151091f93ffda7
diff --git a/compiler/base/parser/src/test/resources/LeafSubStatementMust.yang b/compiler/base/parser/src/test/resources/LeafSubStatementMust.yang
index 6d7e626..1a2c0c1 100644
--- a/compiler/base/parser/src/test/resources/LeafSubStatementMust.yang
+++ b/compiler/base/parser/src/test/resources/LeafSubStatementMust.yang
@@ -7,7 +7,7 @@
             enum ethernet;
             enum atm;
         }
-        must "ifType != 'ethernet'" {
+        must "ifType != ethernet" {
             description "ifType is not ethernet";
         }
     }