do reservations.

Also capture all ipmitool output for presenting to the caller.

Primarily I was after what was causing the occasional segfault.
That problem was caused by calling tmcc on a node that was free.
Seems we were derefing some NULL columns returned by mysql because
we assumed that there would always be a row in experiments for the
node in question.

Since I do need to call tmcd from the "pxewait" initramfs on Moonshot
ARM nodes, I cleaned up this assumption.

Two wrongs do make a right! Now that both bugs are fixed, let's see if
bootinfo will send the right events at the right times...

architecture, be sure to skip those when computing counts.

have to watch for that case. Not perfect but will do. Not sure why
we ever thought it was a good idea to allow type=class! :-)

and images.

def_parentosid/os_submap setup we use now.

Got lost in Leigh's last commit.

"reserve -c idx" now clears the reservation with the given index.  To
get the old behaviour (clearing by project/time), use "reserve -C ...".

meeting, we use the image aliases to create an equivalence class for the
hardware types the image alias refers to. For example, UBUNTU16-64-STD
is an x86 image in the image server. It is also an image alias (at the
Moonshot cluster) that points to the x86 image and the ARM image. So
that means UBUNTU16-64-STD runs on x86 types and moonshot types.

the case that a target is an imported image. We do not post imported
images to the image server since that would just be duplicates. This
decision might need revisting, but in the meantime we tell the image
server the origin urn instead of our local urn.