If the child fetch succeeds but cleanup fails, make sure we use the
intially fetched data, rahter than replacing it with the now potentially
lost child data.

There was the possiblity of losign a PID if child cleanup was
interrupted.  This ensures retries until the child process is actually
dead.

In the end the buffer size had to be increased to avoid timing issues.
Added in further try-except safety checks to prevent system component
issues if this runs long agian.

Resources for interactive jobs are now appropriately released.  There is
still a known issue with currently running aprun instances.  That will
be addressed in a further patch.

Resources weren't actually exititng the cleanup state when there were
other resrervations on the system.  The check to mark nodes idle was not
actually ocurring when a reservation existed to mark nodes as idle..

This should significantly reduce the overhead of the system inventory
for updating state.  Also gets memory statuses.

Need to add dynamic attribute update for running systems.

We can now get and properly display node attributes via the system type
query.

Cray's documentation on what depth and nppn do isn't all that clear.
Apparenlty this arrangement will actually reserve proper numbers of
nodes.

Full allocation now works reliably.

This query from ALPS allows for more detailed information about node
memory to be gained from ALPS.  Supported in versions later than 1.4.

This also necessitated adding in queues at a basic level.  Muliple
queues now supported.  Orthogonal queueus appear to be working
correctly.  Nodeadm now lists nodes and can set queues on a list of
nids.

This corrects a bug where we could have stale apbridge invocations
lingering in the sytem script forker on system component intialization
causing system state initialization to fail due to bad behavior on the
part of the now-dead children.

This allows a number of constants to be set in the Cobalt config file.
We can also now set attributes like width and depth from qsub using
--attrs.  This also adds the hooks for using attrs=location:xxxyyy for a
resource reservation.

I've gotten a test job to run end to end and relase resources.  ALPS
reservation set confirmed released, node added to pool, run and
released.  Lots of cleanup is needed.  Code is at prototype stage. Not
production ready, but a lot closer to it.

A modified version of the user script forker is needed so that we can
confirm the ALPS reservation and set the pg_id from the child.  This
will let apruns from a user script run.

Adds find job location and reserve resources until, along with helper
functions.  Tests pending.  Draining and backfilling pending. Docs
pending.  Config options pending.

alpssystem can now be invoked as a system component.  It will initialize
query and update nodes.  This adds in the udpate behavior for nodes.
Persistence isn't supported yet and will be coming soon.  This is
currently using a base process manager.

Cray-specific node class added.  Cray node manager added.  Can
initialize from the ALPS bridge.  Core of alps bridge added.