Change the queue holdtime announcement to happen at any interval (not just...

Change the queue holdtime announcement to happen at any interval (not just greater than two minutes). Remove
the saying of less-than for holdtime announcements since it can lead to awkward holdtime announcements. Using
'1' as a queue-round-seconds value is no longer valid.

(closes issue #9736)
Reported by: caio1982
Patches:
      queue_announce5.diff uploaded by caio1982 (license 22)
	  Tested by: caio1982, putnopvut


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@103687 65c4cc65-6c06-0410-ace0-fbb531ad65f3