End to end test runner (#281)

Build fission-bundle and fission cli. Install the fission-bundle using
the fission-all helm chart. Run all files matching test_*.sh from the
tests/ directory.

This change doesn't contain any real tests, just the build and test
runner scripts.

Skips the tests when there are no cluster credentials available.

test/tests/test_pass.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -euo pipefail
+
+# This doesn't test fission, just the test framework. It ensures we
+# have the right environment, that's all.
+
+echo "Test test, please ignore."
+
+echo $FISSION_URL
+echo $FISSION_ROUTER
+which fission