Daemon: Don't add change cleanup module when running as slave

Bug: Issue 3696
Change-Id: I0ba9238fca95496bd210f734e388f025925bde90
diff --git a/gerrit-pgm/src/main/java/com/google/gerrit/pgm/Daemon.java b/gerrit-pgm/src/main/java/com/google/gerrit/pgm/Daemon.java
index 35a4cd5..ee1b111 100644
--- a/gerrit-pgm/src/main/java/com/google/gerrit/pgm/Daemon.java
+++ b/gerrit-pgm/src/main/java/com/google/gerrit/pgm/Daemon.java
@@ -376,7 +376,9 @@
       }
     });
     modules.add(new GarbageCollectionModule());
-    modules.add(new ChangeCleanupRunner.Module());
+    if (!slave) {
+      modules.add(new ChangeCleanupRunner.Module());
+    }
     return cfgInjector.createChildInjector(modules);
   }