EventConsumerIT: Stop using deprecated containsAllOf

Replace with containsAtLeast as recommended in the deprecation
notice.

Change-Id: I6fc3caa517ed4aab55789fb4d05ad44e649cf5a8
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/kafka/consumer/EventConsumerIT.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/kafka/consumer/EventConsumerIT.java
index 54ccb96..02d1b7e 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/kafka/consumer/EventConsumerIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/kafka/consumer/EventConsumerIT.java
@@ -154,7 +154,7 @@
             eventsByType.get("ref-updated").stream()
                 .map(e -> ((RefUpdatedEvent) e).getRefName())
                 .collect(toSet()))
-        .containsAllOf(changeNotesRef, patchsetRef); // 'refs/sequences/changes'
+        .containsAtLeast(changeNotesRef, patchsetRef); // 'refs/sequences/changes'
     // not always updated thus
     // not checked