Merge pull request #737 from gfyoung/skip-flake8-python2.x

Skip flake8 check on Python on 2.7

ci/lint.sh

@@ -3,4 +3,8 @@
 echo "Linting repository..."
 source activate hosts
 
-flake8 --max-line-length 120
+if [ "$PYTHON_VERSION" = "2.7" ]; then
+    echo "Skipping flake8 because it is broken on Python $PYTHON_VERSION"
+else
+    flake8 --max-line-length 120
+fi