[POC] setting up tests with eos on drone-ci

[dpakach]

this PR adds scripts for creating a new eos instance in HCloud so that we can run our API tests with the EOS storage backend.

[update-docs]

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[dpakach]

@felixboehm , I have added some scripts that could start up a new hcloud machine with eos.
If we setup the hcloud env with HCLOUD_TOKEN and then run the tests/spwan_eos.sh which should be able to start an eos machine.
We will just have to provide DRONE_HCLOUD_USER and DRONE_COMMIT_ID

[felixboehm]

Looks good!
Did you run the scripts for setup, or did you test same steps manually??
Setup works reliably??

[PVince81]

file name s/spwan/spawn/

[dpakach]

Looks good!
Did you run the scripts for setup, or did you test same steps manually??
Setup works reliably??

I ran the scripts from my local machine and it was able to create a new machine with eos setup on hcloud. If we add credentials for hcloud in drone, it should be able to do the same.

[dpakach]

Blocked by #586
We can successfully start the eos setup on Hcloud but the setup itself is not always working so it is impossible to set it up at the moment.

[butonic]

eos tests are no longer covered by ocis ci. it should run in reva or elsewhere.