Python 3 Fixes: use six.moves.configparser

Use six.moves.configparser instead of ConfigParser for python3 compat.

Change-Id: Ib96e3f1f6cb6959529b3982209e7998ec14d76f5
diff --git a/tests/test_layoutvalidator.py b/tests/test_layoutvalidator.py
index 3de4a94..46a8c7c 100644
--- a/tests/test_layoutvalidator.py
+++ b/tests/test_layoutvalidator.py
@@ -14,7 +14,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import ConfigParser
+from six.moves import configparser as ConfigParser
 import os
 import re