Fix reporting estimated queue hold time.

Just say the number of seconds (after minutes) rather than doing some incorrect
calculation with respect to minutes.

(closes issue #17498)
Reported by: corruptor
Patches: 
      holdesecs_bug.diff uploaded by corruptor (license 253)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@277488 65c4cc65-6c06-0410-ace0-fbb531ad65f3