Use manual_compaction for compaction_job_test

Summary:
Under certain conditions (disable compression) the compactions that are created in compaction_job_test will pass the trivial_move conditions
This will cause problems since we assert that we dont run a compaction if it's a trivial move
https://github.com/facebook/rocksdb/blob/master/db/compaction_job.cc#L144-L147

for example when we disable compression, compactions become a valid trivial move and the assert fails
https://ci-builds.fb.com/view/rocksdb/job/rocksdb_no_compression/180/console

Test Plan: compaction_job_test

Reviewers: sdong, yhchiang, noetzli, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43983

db/compaction_job_test.cc

@@ -38,7 +38,7 @@ void VerifyInitializationOfCompactionJobStats(
   ASSERT_EQ(compaction_job_stats.num_output_records, 0U);
   ASSERT_EQ(compaction_job_stats.num_output_files, 0U);
 
-  ASSERT_EQ(compaction_job_stats.is_manual_compaction, false);
+  ASSERT_EQ(compaction_job_stats.is_manual_compaction, true);
 
   ASSERT_EQ(compaction_job_stats.total_input_bytes, 0U);
   ASSERT_EQ(compaction_job_stats.total_output_bytes, 0U);
@@ -240,7 +240,7 @@ class CompactionJobTest : public testing::Test {
     Compaction compaction(cfd->current()->storage_info(),
                           *cfd->GetLatestMutableCFOptions(),
                           compaction_input_files, 1, 1024 * 1024, 10, 0,
-                          kNoCompression, {});
+                          kNoCompression, {}, true);
     compaction.SetInputVersion(cfd->current());
 
     LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL, db_options_.info_log.get());