cleaned up at validate_pids conversion, fixed YARD doc

in validate_pids no longer need dup as conversion to ints was cleaned
up to use map.  Which also improved readability and allowed adding uniq
and compact, thanks egypt.
YARD doc on cmd_suspend was incorrectly organized
Addressed egypt's comments

-changed the suspend/resume loop logic to reduce code duplication.
-fixed up some print_*'s to remove embedded \n's
-changed formatting on some error messages
-switched comment to a TODO:
-change host_processes.select (blah} to use .find instead
-adjusted code due to remvoal of the pids.dup, resulting in arr_pids
disappearing