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Python does not do any automatic path expansions.
User has to call functions such as expanduser() and
expandvars().

Add uesr's id_rsa.pub file as default ssh_keys file.

Allow for search both by name (using regular
expressions) or by id.

Instead of cloning Synnefo from its official repo,
user can choose (using --local-repo option, or by not
setting the synnefo_repo config parameter) to use
his local repo.

Install snf-deploy from the Synnefo repo
and not from it's old one.

The option flavor_name support a list of flavors to try.

Refs #4192

Specify a flavor_name (in form of a reg expression) to use.

Currently support http, https and ftp protocols
using the wget utility.

Using this option one can specify a file containing
ssh authentication keys to be uploaded and installed
on the newly created server.

User doesn't need to specify the UUID of the owner of
system images (it's usually hard to find it).

Instead save the uuids for these users for our production and
testing deployments inside a list (DEFAULT_SYSTEM_IMAGES_UUID) and
use that (uuids never change). If you need to specify another user
it's preferable to specify the image_id using the corresponding option.

Guess the branch to build, based on the current branch of the
repository. Also track all remote branches when cloning Synnefo, because
it is needed by devflow.

Make 'ssh_keys' and 'accept_ssh_from' optional, since there are not
mandatory for ci to work.

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.