fix(test): Verify apps:run output
feat(router): custom request size.
Merge pull request #1770 from johanneswuerbach/improve-integration-test

fix(test): Verify apps:run output
Merge pull request #1777 from aledbf/custom_body_size

feat(router): custom request size.
docs(router): keep etcd keys ordered.
Merge pull request #1779 from aledbf/1777_sort_list

docs(router): keep etcd keys ordered.
Correct documentation mistake

`ssh-agent -L` will result in `unknown option -- L`
Merge pull request #1781 from ngbinh/master

docs: ssh-add documentation mistake
feat(contrib/digitalocean): Use native CoreOS integration

Use the native CoreOS experience as recently added by DigitalOcean.

This rewrites the previous provisioning script and replaced the tugboat
dependency by the new docl tool dependency.
Docl was written specifically to support the operations we need.
Once a new DigitalOcean CLI comes out with support for the metadata
flag the use of Docl can be reexamined.