Make EventListenerTest.CompactionReasonLevel more deterministic

Summary:
In this test some times automatic compactions do everything and Manual compaction become a no-op.
Update the test to make sure manual compaction is not a no-op

Test Plan: run the test

Reviewers: andrewkr, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57189

db/listener_test.cc

@@ -484,7 +484,10 @@ TEST_F(EventListenerTest, CompactionReasonLevel) {
   listener->compaction_reasons_.clear();
   Reopen(options);
 
-  db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
+  Put("key", "value");
+  CompactRangeOptions cro;
+  cro.bottommost_level_compaction = BottommostLevelCompaction::kForce;
+  ASSERT_OK(db_->CompactRange(cro, nullptr, nullptr));
   ASSERT_GT(listener->compaction_reasons_.size(), 0);
   for (auto compaction_reason : listener->compaction_reasons_) {
     ASSERT_EQ(compaction_reason, CompactionReason::kManualCompaction);