test/py: Disable error E0611 in two cases for pylint

Recently pylint has started to complain about:
No name 'fs_helper' in module 'tests' (no-name-in-module)

Due to:
from tests import fs_helper

However, we have:
test/py/tests/fs_helper.py

And since we do not want to add a dummy test/py/tests/__init__.py to
silence this warning we instead just disable it as needed.

Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>

test/py/tests/test_fs/conftest.py

@@ -9,6 +9,7 @@ import re
 from subprocess import call, check_call, check_output, CalledProcessError
 from fstest_defs import *
 import u_boot_utils as util
+# pylint: disable=E0611
 from tests import fs_helper
 
 supported_fs_basic = ['fat16', 'fat32', 'ext4']

test/py/tests/test_ut.py

@@ -9,6 +9,7 @@ import os.path
 import pytest
 
 import u_boot_utils
+# pylint: disable=E0611
 from tests import fs_helper
 
 def mkdir_cond(dirname):