app_queue: Make queue reload members and variants of that work

Prior to this patch, 'queue reload members' cli command did not
work at all. This also affects the manager function 'QueueReload'
when supplied with the 'members: yes' field.

(closes issue AST-956)
Reported by: John Bigelow
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Merged revisions 373298 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 373300 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 373318 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@373319 65c4cc65-6c06-0410-ace0-fbb531ad65f3