Blacklist tests that don't work on s3

This patch introduces a new pytest marker that skip tests that currently don't work when
s3 is used as the underlying file system. The set of blacklisted tests is a superset of
tests that cannot be run with s3. Follow up patches will remove some of the test files
from the blacklist.

Change-Id: I39a58223d3435f0bd6496ffd00a2d483b751693d
Reviewed-on: http://gerrit.cloudera.org:8080/82
Reviewed-by: Ishaan Joshi <ishaan@cloudera.com>
Tested-by: Internal Jenkins

tests/query_test/test_compressed_formats.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 # Copyright (c) 2012 Cloudera, Inc. All rights reserved.
 
+import os
 import pytest
 from os.path import join
 from subprocess import call
@@ -102,6 +103,7 @@ class TestCompressedFormats(ImpalaTestSuite):
       call(["hive", "-e", drop_cmd]);
 
 
+@pytest.mark.skipif(os.getenv("TARGET_FILESYSTEM") == "s3", reason="Disabled on s3")
 class TestTableWriters(ImpalaTestSuite):
   @classmethod
   def get_workload(cls):