Helm chart bugfixes + end to end test bugfixes (#293)

Helm Chart fixes: bump chart version, parameterize image pull policy, pass poolmgr url to router.

E2E test: add a simple hello world test. Make test runner dump fission logs after test.

test/build_and_test.sh

@@ -11,10 +11,13 @@ fi
 source $(dirname $0)/test_utils.sh
 
 IMAGE=gcr.io/fission-ci/fission-bundle
+FETCHER_IMAGE=gcr.io/fission-ci/fetcher
 TAG=test
 
 build_and_push_fission_bundle $IMAGE:$TAG
 
+build_and_push_fetcher $FETCHER_IMAGE:$TAG
+
 build_fission_cli
 
-install_and_test $IMAGE $TAG
+install_and_test $IMAGE $TAG $FETCHER_IMAGE $TAG