refactor: extract xecommand
Re-create xvdb on virtual appliance

If the devstack machine has an xvdb, it will be re-created so that it
could be exported sparsely
Merge pull request #24 from matelakat/xva-deal-with-cinder-drive

Xva deal with cinder drive
Fix parameter ordering
store the host key with ssh-keyscan and require devstack_tgz_url
XVA: Fix error in stage2

Fixes #25
Fix name-label in extra vbd
List devstack.xva to show its size
Support FFS/NFS as well as EXT
Fix typo
Lock machines in random order
Get the IP address from the management interface and exclude tests we know are broken on XS
Adding collection of devstack artifacts - move them to dom0 so jenkins can pull them down
Fix parameter typo
Merge branch 'master' of github.com:citrix-openstack/qa
Unattended apt for xenserver-core build job

To be able to run the xenserver-core-ubuntu builder job, the system's
apt needs to be configured to be fully automatic.
Merge pull request #27 from matelakat/unattended-apt

Unattended apt for xenserver-core build job
Always collect logs; even if a failure is occuring
Copy logs on more failures
Get guest IP address