Adapt to changed REST interfaces in Gerrit core

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ide1f6792194ddc2e4668a89e9d9ba777dab821b7
diff --git a/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java b/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
index de7348e..9caa9e2 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
@@ -62,7 +62,7 @@
    * @throws StorageException
    */
   @Override
-  public Object apply(RevisionResource rev, Input input)
+  public Response<Object> apply(RevisionResource rev, Input input)
       throws IOException, RestApiException, StorageException, ConfigInvalidException {
     Map<String, Boolean> branchMap = input.branchMap;