Added NewConnWithUser to allow users other than the default
Added NewConnWithUser to allow users other than the default

ceph/go-ceph,ceph/go-ceph,AcalephStorage/go-ceph,noahdesu/go-ceph,theanalyst/go-ceph,AcalephStorage/go-ceph,noahdesu/go-ceph,ceph/go-ceph,webfd/go-ceph,theanalyst/go-ceph,webfd/go-ceph