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Add '--fetch-packages' option to snf-ci script, in order to download the
created debian packages.

Add 'config_file' argument to SynnefoCI in order to use a different
configuration file. Also, added the corresponding option to 'snf-ci'
scirpt.

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

Make 'snf-ci' python script to run CI commands.

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.

Add option to use a custom image_id and flavor_id instead of getting
them from config file.

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

Add option for copying ssh keys to the created vm.

* override config file from env variable
* pep8 fixes
* do not display vm password
* fail if cloning repo fails
* do not use eval

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.

Plankton returns properties whereas Cyclades returns
metadata for the images.

With this flag one can specify the owner of the
system images.
Currently one has to specify owner's uuid.
This options is mandatory.

when helpdesk users search using ip address

In case creating a VM fails before the OP_INSTANCE_CREATE job is
enqueued in Ganeti, the VM and its NICs must be deleted, and the
resources must be released from Quotaholder, which is exactly what is
done when a VM is deleted from Ganeti. Instead of duplicating the code,
this commit uses the same function that is used by snf-dispatcher, by
mocking an successfully OP_INSTANCE_REMOVE.

Commit #32a0b85, modified server creation, by refetching the object from
DB after issuing commission to quotaholder. However, the new object is
not having the 'config_url' attributed, which is added to the vm object
by the 'vmapi'. This commit, fixes this by moving the signal dispatching
code after refetching the vm. Also, this commit makes more clear the
exception handling code, when the creation job can not be enqueued to
Ganeti.

* Set DJANGO_SETINGS_MODULE
* Disable by default failure reports
  during container quota updates

Refs: #4063

_lookup_container() locks the container path
but it was not called from some write backend methods
that expect the container path to be locked.

In such cases optionally _lookup_object() calls
the _lookup_container() in order to lock the container path.

Set backend to None if not specified.