Update:
I used a spare HDD on the same laptop and setup 16.04 LTS per Ubuntu Disk 
Partitioning recommendations as follows: Swap, /, and Home in that order. Grub 
is on the 1st Primary as boot, Swap, /, and Home are logical on the 1st 
extended.  There are no other operating systems on this HDD. There is only this 
one HDD physically installed.  With this HDD installed as described here I NO 
LONGER have issues during shutdown or reboot.  

If I physically install the original HDD as it is described in this bug
description I Still DO have issues with the hang on shutdown and reboot.

I cannot conclude anything but I speculate that the original HDD setup
as /, Home, Swap in that order, or the config of fstab may have some
significance to the issue.

It has been over 2 months using this new HDD in my laptop without any
hangs.  There has never been a Target reached Shutdown hang since
installing the new HDD.  I waited to be sure the hang is gone before
reporting any new data.  I will keep this new hardware configuration and
use the original HDD as a spare for future use.

Thank you for all your efforts to resolve the issue.

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https://bugs.launchpad.net/bugs/1582011

Title:
  Swap Failed, Indefinite hang on reboot/shutdown "Reached target
  Shutdown"

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