add python3 to local openwhisk

travis/setup.sh

diff --git a/travis/setup.sh b/travis/setup.sh
index b26f250..a772606 100755
--- a/travis/setup.sh
+++ b/travis/setup.sh
@@ -19,6 +19,8 @@
 docker tag openwhisk/invoker ${IMAGE_PREFIX}/invoker
 docker pull openwhisk/nodejs6action
 docker tag openwhisk/nodejs6action ${IMAGE_PREFIX}/nodejs6action
+docker pull openwhisk/python3action
+docker tag openwhisk/python3action ${IMAGE_PREFIX}/python3action
 
 # Deploy OpenWhisk
 cd $WHISKDIR/ansible