Fix for job cancel when node reconfig fails

If a job is cancelled by the user while it's allocated nodes are being
    reconfigured (i.e. the capmc_resume program is rebooting nodes for the job)
    and the node reconfiguration fails (i.e. the reboot fails), then don't
    requeue the job but leave it in a cancelled state. Note the JOB_RECONFIG_FAIL
    state flag is currently only used by capmc_resume, but could be used for
    other programs responsible for node reboots.
bug 3392