max_width parameter from split_hostlist.

Without this change the function route_split_hostlist_treewidth()
in src common would not be available to the route plugins

the slurm api can not be used without this change
also, the route plugins were not in the RPMs

Note that the map/mask specified applies to all allocated nodes.

Previously the test could start and fail due to completing jobs

Fix for possible abort on change in GRES configuration.
bug 958

limitation in terms of scalability, I did some tests with cluster sizes
varying from 64 to 64k nodes. I saw the same kind of performance issues
that you saw with large sizes (more than a few thousands nodes).

Looking at the code, I noticed that the hash table of the node records
was not built before the construction of the topology information in
slurmctld ! Making sure that the hash table is present really reduces
the built time.

This patch ensures that and enable to get sub-second built time
for topology information in scenarios that were used to require a
minute before.

I think that using this patch, the load time of slurm confs is less
problematic.

implemented.

using switch topology information.

Job requeue test assumed the job would not be started immediately
after requeue, but that could happend and result in a test
reporting FAILURE, when the job really was requeued.

Conflicts:
	testsuite/expect/test21.24

(commit 4cd63575)
with sacctmgr load when Parent has "'" around it