This reverses some patches from Gerrit that were old, going to work
forward now from the start

immediately before attempting to schedule jobs.
04_Cray-INVENTORY-directly-before-schedule.diff

select/cray: do the inventory immediately before each schedule

This puts the Basil inventory immediately before each (backfill) schedule. 

Having considered multiple alternatives, this is the most robust and least
wasteful solution. The reason is that ALPS keeps internal node state, which
can be changed
 * by the administrator (xtprocadmin),
 * by the node health checker programs (setting some nodes into 'suspect'),
 * by ALPS itself.

Tracking this periodically, e.g. every HealthCheckInterval, may mean to miss
some state changes. The result would not be a crash, but a subsequently
failed ALPS reservation, which would require to undo some of the slurm state.

FIXME: since we are not using this, we have not yet considered wiki/wiki2.
       Possible places to update these are:
       - run periodic checkes every HealthCheckInterval (sub-optimal),
       - change plugins/sched/wiki{,2}/get_nodes.c

    XT/XE systems, and build on native Cray XT/XE systems (auto-detected).
    Building on native Cray systems requires the cray-MySQL-devel-enterprise
    rpm and expat XML parser library/headers.

select/cray: update compile-time and runtime support for Cray build

These changes update build support for Cray XT/XE:
 1. renamed '--cray-xt' into '--cray' since also XE systems are supported;
 2. autoconf rules to cover the various possible build cases:
    a) --enable-cray=off: HAVE_CRAY/HAVE_NATIVE_CRAY undefined,
    b) --enable-cray=on:  HAVE_CRAY defined
       b1) local host is a native Cray system: HAVE_NATIVE_CRAY defined
           (requires installation of mysql-devel and libexpat-devel packages),
       b2) local host is not a native Cray system: the conditionally built
           parts (basil_interface.c, libalps.la) are not built;
 3. updated configure logic:
    - since Cray support depends on mySQL, reordered tests in configure.ac,
    - reordered logic with regard to changes in (2),
    - an AM_CONDITIONAL to build native-Cray parts conditionally,
    - updated configure messages (XT/XE);
 4. run-time read_conf test to ensure use of select/cray is properly supported,
 5. an update of the NEWS file due to the change in (1) ==> may have a conflict
    in case you have a locally-updated copy.

I have compile-tested the three possible scenarios in (2).

    03_Cray-BASIL-node-ranking.diff
select/cray: perform node ranking

This supplies the select function-pointer to request a reordering of nodes based
on the current Cray node ordering. 

The Cray node ordering is set internally via the ALPS_NIDORDER configuration 
variables that controls the way ALPS considers nodes.

This ordering in turn determines the order of nodes as the appear subsequently 
in the Inventory output. The present patch exploits this fact and uses an
auto-incrementing number to reflect the node ranking (counting is reversed 
since the parser returns the nodes in stack/LIFO order).

The node ranking is performed on slurmctld (re-)configuration, hence the tests
are more stringent: exit if Inventory fails (this condition is extremely rare)
and if no nodes are powered up (also a condition that can be cured by restarting
slurmctld only when the system is ready).

    03_node-reordering-NodeHostName.diff

    02_Cray-BASIL-node-attributes-and-coordinates.diff

    02_salloc-no-node-update.diff

    01_Cray-BASIL-basic-support.diff plus
    01_changes-from-first-revision-of-patch-01.diff

    eliminates some inappropriate error messages. 01_interactive-no-script.diff

do that as part of building each tab's display

testing for memory leaks. Provides much better performance.

(previous code used atoi function, which does not work with 'A', etc.).

    expected start time was too far in the future for the backfill scheduler
    to compute.

    values as "*" rather than 65534. Patch from Rod Schulz, BULL.

    the job's priority using scontrol's "update jobid=..." rather than its 
    "hold" or "holdu" commands.

calls for improved performance

Fixed issue when using a storage_accounting plugin directly without the slurmDBD updates weren't always sent correctly to the slurmctld, appears to OS dependent, reported by Fredrik Tegenfeldt.

    clusters over 1000 nodes. Users can enable this by selecting the "Name"
    tab. This change dramatically improves scalability of sview.