Note when setting node state power up/down happens

The power up/down request only takes effect after the ResumeTimeout
or SuspendTimeout is reached in order to avoid a race condition.
Prevent power up of CLOUD node on slurmctld startup

If a node is powered down, then do not power it up on slurmctld
restart.
Permit power_down of node in down state

if a node is down, then permit setting its state to power down,
which causes the SuspendProgram to run and set the node state
back to cloud.
Merge branch 'slurm-14.03'