ProjectIT: Add tests for ref-updated events on project creation

When a new project is created its refs/meta/config branch is created
with the project's initial config. This should result in a ref-updated
event being emitted.

These tests don't create the project with an initial empty commit,
so there should therefore be no corresponding ref-updated event for
the refs/heads/master branch.

Change-Id: I5fadc4b8221637807aaa3275783cbb1228c6bbc9

gerrit-acceptance-framework/src/test/java/com/google/gerrit/acceptance/AbstractDaemonTest.java

@@ -867,6 +867,11 @@ public abstract class AbstractDaemonTest {
     }
   }
 
+  protected RevCommit getRemoteHead(String project, String branch)
+      throws Exception {
+    return getRemoteHead(new Project.NameKey(project), branch);
+  }
+
   protected RevCommit getRemoteHead() throws Exception {
     return getRemoteHead(project, "master");
   }