Fix `binary` data passing via sysrepo and NETCONF

Change-Id: I1e30621fa9d1189efd964593e76f381c2cb3378d
diff --git a/tests/example-schema.yang b/tests/example-schema.yang
index a24b891..5d84eda 100644
--- a/tests/example-schema.yang
+++ b/tests/example-schema.yang
@@ -239,4 +239,8 @@
             base "Animal";
         }
     }
+
+    leaf blob {
+        type binary;
+    }
 }