Use cflinuxfs3 by default for docker apps
Use cflinuxfs3 by default for docker apps

[#164874454](https://www.pivotaltracker.com/story/show/164874454)

Co-authored-by: Sebastian Vidrio <68ba84219e4e2d7d15fed3ed668bd2821314e420@pivotal.io>

cloudfoundry/cf-deployment,cloudfoundry/cf-deployment