This reverts commit c881baed29.
Eventhough batch_size is set, rabbitMQ prefetch count is not changed
at the first time of connection creation. It works only connection reset
cases(i.e. rabbitMQ restart). So this patch can not fix original issue
https://bugs.launchpad.net/ceilometer/+bug/1551667
Moreover, it makes another bug that messages of sameple queues are not
consumed properly. So revert it.
Change-Id: Ia8ebee8e2a670e46b6a68859bc30e717bd56ed7e
Signed-off-by: Wonil Choi <wonil22.choi@samsung.com>
Closes-bug: 1759755
(cherry picked from commit e0e8a1ea68)