put the packed buffer on the list.

Looks like this should of happened in 3d4ff78e

Conflicts:
	src/common/slurm_protocol_defs.c

composite_response_msg_t.  Now composite_msg_t is sent for both sending
and responses.

Mostly dead stores.
One bad index in job accounting for TRES.
one bad index in slurmd memory limit per CPU calculation

This also moved some more functions from the slurmd into common.

This also moved some more functions from the slurmd into common.

Fix systemd startup files to use default values for pid files

Conflicts:
	src/plugins/switch/cray/util.c

switch/cray: Revert logic added to 14.11.6 that set "PMI_CRAY_NO_SMP_ENV=1"
if CR_PACK_NODES is configured.
bug 1585

at this point.