Make ldb_test not depend on compression

Summary: This is failing our tsan tests. Our new behavior is to fail DB::Open() if the requested compression is not available. The easiest fix is to make ldb_test not depend on compression.

Test Plan: python tools/ldb_test.py

Reviewers: sdong, yhchiang, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42075

tools/ldb_test.py

@@ -292,8 +292,8 @@ class LDBTestCase(unittest.TestCase):
                 "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
         # Dump and load with lots of extra params specified
-        extraParams = " ".join(["--bloom_bits=14", "--compression_type=bzip2",
-                                "--block_size=1024", "--auto_compaction=true",
+        extraParams = " ".join(["--bloom_bits=14", "--block_size=1024",
+                                "--auto_compaction=true",
                                 "--write_buffer_size=4194304",
                                 "--file_size=2097152"])
         dumpFilePath = os.path.join(self.TMP_DIR, "dump6")