Remove non-gtest from parallelized tests

Summary:
compact_on_deletion_collector_test does not support --gtest_list_tests
since it isn't gtest, so the full program would run for the target
gen_parallel_tests. This caused gen_parallel_tests to take 8+ minutes for tsan
and prevented compact_on_deletion_collector_test from running during check_0
since no t/run-* script could be generated.

Test Plan:
run make check, verify generating t/run-* scripts is fast and
./compact_on_deletion_collector_test is now run

Reviewers: IslamAbdelRahman, wanning, lightmark, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D61695

Makefile

@@ -387,7 +387,6 @@ TESTS = \
 
 PARALLEL_TEST = \
 	backupable_db_test \
-	compact_on_deletion_collector_test \
 	db_compaction_filter_test \
 	db_compaction_test \
 	db_sst_test \