Integration test improvements (#447)

A few improvements to the integration test:

* Search for test files recursively in the test dir
* Output a test report at the end for a quick summary of what tests passed/failed/were skipped
* Add support skipping test files; skip the logging test since it's broken (#446 is tracking this)
* Switch to latest helm version
* Cleanup namespace

test/tests/test_logging/log.js

@@ -1,8 +1,8 @@
 
 module.exports = async function(context) {
-    console.log("log test log test log test")
+    console.log("log test")
     return {
         status: 200,
-        body: "Log, test!\n"
+        body: "log test\n"
     };
 }