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Remove the 'deploy_on_io' option. Instead check if you will need to
compute manually the ssh port by the domain of the cyclades url.

Get credentials for deployment from .kamakirc instead of config file.
Also, add option in config file indicating which cloud for kamaki to
use. Finally, add option in SynnefoCI to override the cloud from config.

Refs #4193

Spawn VM to use as builder-slave.
Build packages inside this VM.
Deploy Synnefo using snf-deploy.
Run unit tests.
Run functional tests using burnin.