Merge pull request #3612 from zhouyuan/acct_get_resp_headers

rgw: Adding stats in the header of GET response on account

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

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

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

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