Increase timeout on batch package tests

ExpandRecurringBillingEventsActionTest is occasionally timing out on Kokoro

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140363421

javatests/google/registry/batch/BUILD

@@ -40,6 +40,7 @@ java_library(
 
 GenTestRules(
     name = "GeneratedTestRules",
+    timeout = "long",
     default_test_size = "medium",
     shard_count = 4,
     test_files = glob(["*Test.java"]),