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* Delete outdated text detection sample that duplicates detect.js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* Revert deletion of outdated sample - @gguuss says we still use this.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

Author: Ace Nassri

cloud-language/snippets/slackbot/package.json

@@ -8,7 +8,7 @@
   "main": "demo_bot.js",
   "dependencies": {
     "botkit": "0.0.5",
-    "@google-cloud/language": "0.7.0",
+    "@google-cloud/language": "0.8.0",
     "sqlite3": "3.1.8"
   },
   "scripts": {