Put header files in alphabetic order, No change in logic

# Conflicts:
#	src/slurmctld/controller.c

trying to verify the cluster name (which may try to /create/ files or
directories) *before* dropping privs results in a fatal error as
slurmctld tries to create items which ultimately fail.  Moving
this process until after the privs and uid have changed allows
the process to succeed.

Reported by Jon Nelson <jdnelson@dyn.com>

Bug 2728

Reject invalid step at submit time rather than leaving it queued.
Bug 2722 describes one of the use cases triggering the bug.

Minor update to commit 2fad3bcf
This leaves the files locked until file write completes.

Disable a job deadline test with no input time limit if the default
partition has a default time limit.

This partially restores commit 03b2cfb5
Logic was not closing file descriptor, which left the file locked and
leaked an open file descriptor.

tasks-per-node/nodes != tasks print warning and ignore
ntasks-per-node.

Bug 2520

On a Cray, the output file isn't being created the second time.

Make test_id in more tests be just the numeric value rather than "test#.#"
for consistency with the other tests.

Make test_id in test30.1 be just the numeric value rather than "test30.1"
for consistency with the other tests.

The account still had maxnodes=1 set preventing the qos grpnodes to take
affect. This showed up on slower machines because it takes a second for
the changes to get to the controller.

Test would originally try to start more jobs than default_queue_depth
in SchedulerParameters and fail

Job was failing on Cray/kachina due to timeout. Increase job time
  limit from 1 to 2 minutes.

make it to the slurmctld when using message aggregation.

make sure we handle it correctly when the database comes back up.

Give test job an extra second to start. Test was failing by one
  second on kachina.

Get the maximum file pathname size from system include file rather
  than local #define. This was causing failures on kachina test.

# Conflicts:
#	src/plugins/select/cray/select_cray.c
#	testsuite/expect/test1.84

    for better robustness.  This cray/select plugin code has
    been modified to remove a possible timing window where two
    aeld pthreads could exist, interfering with each other through
    the global aeld_running variable.

    An additional validity check has been added to the data provided
    to aeld through an alpsc_ev_set_application_info() call.
    If an error is returned from that call, only certain errors
    need the current socket connection closed to aeld and a new
    connection established.  Other error returns will log an
    error message and keep the current session established with
    aeld.

This might possibly be related to bug 2334, but it's a long shot.