VisibleRefFilterIT: Disable ReviewDb access

VisibleRefFilter may need to evaluate visibility for tens of
thousands of refs. Doing tens of thousands of random Changes table
lookups in order to load changes is a nonstarter, so forbid this in
the tests.

We still need to pass a ReviewDb instance as it's required to pass to
ChangeControl which needs to create a ChangeData. But we should be
getting everything we need for the Change from the secondary index.
So use a DisabledReviewDb.

Change-Id: I369b1aa7612400a0c36844702d551d6676b6c691
diff --git a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/git/VisibleRefFilterIT.java b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/git/VisibleRefFilterIT.java
index b5b4f72..63ef494 100644
--- a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/git/VisibleRefFilterIT.java
+++ b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/git/VisibleRefFilterIT.java
@@ -35,6 +35,7 @@
 import com.google.gerrit.server.git.VisibleRefFilter;
 import com.google.gerrit.server.project.ProjectControl;
 import com.google.gerrit.server.project.Util;
+import com.google.gerrit.testutil.DisabledReviewDb;
 import com.google.inject.Inject;
 import com.google.inject.util.Providers;
 
@@ -271,7 +272,7 @@
       ProjectControl ctl = projectControlFactory.controlFor(project,
           identifiedUserFactory.create(Providers.of(db), user.getId()));
       VisibleRefFilter filter = new VisibleRefFilter(
-          tagCache, changeCache, repo, ctl, db, true);
+          tagCache, changeCache, repo, ctl, new DisabledReviewDb(), true);
       Map<String, Ref> all = repo.getAllRefs();
       assertThat(filter.filter(all, false).keySet())
           .containsExactlyElementsIn(expected);