discovery: InterfaceName support for global discovery.

MultiPart: 2/3
Change-Id: I816304836f8c7d8683e940d44ed67965fcfd2950
diff --git a/lib/src/test/java/io/v/impl/google/lib/discovery/GlobalDiscoveryTest.java b/lib/src/test/java/io/v/impl/google/lib/discovery/GlobalDiscoveryTest.java
index cc1b693..5787861 100644
--- a/lib/src/test/java/io/v/impl/google/lib/discovery/GlobalDiscoveryTest.java
+++ b/lib/src/test/java/io/v/impl/google/lib/discovery/GlobalDiscoveryTest.java
@@ -40,6 +40,7 @@
         Discovery d1 = GlobalDiscovery.newDiscovery(ctx, testPath);
 
         Advertisement ad = new Advertisement();
+        ad.setInterfaceName("foo/bar/baz");
         ad.setAddresses(Arrays.asList("/h1:123/x"));
 
         VContext advCtx = ctx.withCancel();