While working on a function to submit jobsets, I realized that we
actually don't need them anymore. With the new job dependencies, the
iallocator plugin can just generate the right dependencies and gets the
same effect as with jobsets. This saves us from having to implement
jobsets in Ganeti core.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

In order to increase the amount of information returned from the
IAllocator plugin, we enhance the return values from the node-evac and
change-group operations.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

A while ago a new ``multi-relocate`` mode was proposed and documented.
As it turned out, the interface had some deficiencies. With this patch
The relocation modes are reduced to two and split into separate
iallocator request modes: node-evacuate and change-group. Some request
and response requirements are clarified in the documentation.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Adeodato Simo <dato@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Adeodato Simo <dato@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>