🌈 Add pylint test

Author: ehdsouza

pylint.sh

@@ -5,4 +5,5 @@ PYTHON_VERSION=$(python -c 'import sys; print(".".join(map(str, sys.version_info
 echo "Python version: $PYTHON_VERSION"
 if [ $PYTHON_VERSION = '2.7' ]; then
   pylint watson_developer_cloud
+  pylint test
 fi