Adds updates including compute [(#2436)](GoogleCloudPlatform/python-docs-samples#2436)

* Adds updates including compute

* Python 2 compat pytest

* Fixing weird \r\n issue from GH merge

* Put asset tests back in

* Re-add pod operator test

* Hack parameter for k8s pod operator

Author: gguuss

samples/snippets/requirements.txt

@@ -1,6 +1,6 @@
 grpcio>=1.2.0
-google-auth==1.6.2
+google-auth==1.6.3
 google-auth-httplib2==0.0.3
 google-cloud==0.34.0
-google-cloud-storage==1.13.2
-google-cloud-dataproc==0.3.1
+google-cloud-storage==1.19.1
+google-cloud-dataproc==0.5.0