backend support for hostless jobs
* support in rpc_interface.create_job() and models for creating a hostless job -- a job with one queue entry with no host, meta_host or atomic_group
* support in scheduler for recognizing and executing such a job. the bulk of the work was in extracting an AbstractQueueTask class from QueueTask, containing all the logic not pertaining to hosts. I then added a simple HostlessQueueTask class also inheriting from it.
Also got rid of HostQueueEntry.get_host() and added an extra log line when AgentTasks finish (used to be for QueueTasks only).
Signed-off-by: Steve Howard <showard@google.com>
git-svn-id: http://test.kernel.org/svn/autotest/trunk@4018 592f7852-d20e-0410-864c-8624ca9c26a4
6 files changed