vstart: start rgw on port specified by env var

This ensures that user specified option according to $CEPH_RGW_PORT is
considered before starting radosgw

Signed-off-by: Abhishek Lekshmanan <abhishek.lekshmanan@ril.com>
Merge pull request #2327 from theanalyst/fix/vstart_rgw_port

vstart: start rgw on port specified by env var

Reviewed-by: Sage Weil <sage@redhat.com>
fix wrong value of op_w_latency perf counter

Fixes: #9217

Signed-off-by: xinxin shu <xinxin.shu@intel.com>
don't update op_rw_rlatency/op_w_rlatency when rlatency is zero

Signed-off-by: xinxin shu <xinxin.shu@intel.com>