Travis: fix failing tests + update dependencies (#335)

* Make unify script recursive + clean up dependency conflicts

* Restore travis.yml

* Delete outdated text detection sample that duplicates detect.js

* Fix failing KMS + vision tests by updating dependencies

* Fix video tests using a bad cwd

* Upgrade monitoring dependency + skip flaky monitoring tests

* Fix DLP tests having wrong cwd

* Fix failing vision test

* Fix datastore tests

* Update broken dependency

* Update possibly broken compute engine dependency

* Fix typos

* Disable Node 4 testing

* Revert deletion of outdated sample - @gguuss says we still use this.

This reverts commit b7259c8.

* Update dependency

video-intelligence/system-test/analyze.test.js

@@ -18,23 +18,25 @@
 'use strict';
 
 require(`../../system-test/_setup`);
+const path = require(`path`);
 
 const cmd = `node analyze.js`;
+const cwd = path.join(__dirname, `..`);
 
 // analyze_faces
 test(`should analyze faces`, async (t) => {
-  const output = await runAsync(`${cmd} faces gs://nodejs-docs-samples/video/google_gmail.mp4`);
+  const output = await runAsync(`${cmd} faces gs://nodejs-docs-samples/video/google_gmail.mp4`, cwd);
   t.regex(output, /Thumbnail size: \d+/);
 });
 
 // analyze_labels
 test(`should analyze labels`, async (t) => {
-  const output = await runAsync(`${cmd} labels gs://nodejs-docs-samples/video/cat.mp4`);
+  const output = await runAsync(`${cmd} labels gs://nodejs-docs-samples/video/cat.mp4`, cwd);
   t.regex(output, /Label description: Whiskers/);
 });
 
 // analyze_shots
 test(`should analyze shots`, async (t) => {
-  const output = await runAsync(`${cmd} shots gs://nodejs-docs-samples/video/gbike_dinosaur.mp4`);
+  const output = await runAsync(`${cmd} shots gs://nodejs-docs-samples/video/gbike_dinosaur.mp4`, cwd);
   t.regex(output, /Scene 0:/);
 });