Merge pull request #4309 from prallabh/master

RGW: Make RADOS handles in RGW to be a configurable option

Passed rgw teuthology suite run.

Reviewed-by: Yehuda Sadeh <yehuda@redhat.com>

diff --cc src/common/config_opts.h
Simple merge

diff --cc src/rgw/rgw_rados.cc
Simple merge

diff --cc src/rgw/rgw_rados.h
Simple merge