In the beginning, the number and size of experiments was small, and so
storing the entire slice/sliver status blob as json in the web task was
fine, even though we had to lock tables to prevent races between the
event updates and the local polling.

But lately the size of those json blobs is getting huge and the lock is
bogging things down, including not being able to keep up with the number
of events coming from all the clusters, we get really far behind.

So I have moved the status blobs out of the per-instance web task and
into new tables, once per slice and one per node (sliver). This keeps
the blobs very small and thus the lock time very small. So now we can
keep up with the event stream.

If we grow big enough that this problem comes big enough, we can switch
to innodb for the per-sliver table and do row locking instead of table
locking, but I do not think that will happen

For each type for which a reservation exists, also tell them about
the number of ready and reloading nodes of that type.

Otherwise reservation admission control might get temporarily unhappy.

See issue #276.

permissions.

or double quotes (Mike's torture test).

interface, there is no good that come of that. For admins, remove all
options, none of them make sense. Instead, provide a link to the Portal
status page.

This closes issues #281.

updates pushed from the clusters to the Portal via the existing event
system. We already send status events when something changes, lets just
do a periodic push as well in case something gets lost.

start time.

of the current time. Basically using a sequence number now.

fix the race condition in event reporting to the Portal.

MotherShip); need to run the aptevent daemon on all clusters, with the
difference that on the MotherShip it listens for events from the SSL
pubsubd, while on other clusters it listens to the local pubsubd for
those same events (slice/slivee status, image, frisbee status events).

With an optional reason why.

(Not yet implemented: if no reason is supplied, generate a random one.)

for a long time.

give me everything. But do not allow for XEN vms, since that would not
make any sense.

1. Size is optional, it means give me all. Note that the NS parser turns
   this into a 0 size.

2. Convert from MiB to GB which is how geni-lib wants it.

Closes #251.

name as Classic experiment.