etcd version bump: 2.2.4
etcd version bump: 2.2.4

Signed-off-by: Ulexus <312f9864a12a2a4430f9501649ff297b12e4a62b@gmail.com>

CoRfr/ceph-docker,osixia/ceph-docker,dmitryint/ceph-docker,rootfs/ceph-docker,mkkie/ceph-docker,CoRfr/ceph-docker,rootfs/ceph-docker,AcalephStorage/ceph-docker,cdxvirt/ceph-docker,cdxvirt/ceph-docker,fmeppo/ceph-docker,ceph/ceph-docker,AcalephStorage/ceph-docker,CoRfr/ceph-docker,dmitryint/ceph-docker,fmeppo/ceph-docker,ceph/ceph-docker,mkkie/ceph-docker,JrCs/ceph-docker,dmitryint/ceph-docker,fmeppo/ceph-docker,osixia/ceph-docker,osixia/ceph-docker,AcalephStorage/ceph-docker,JrCs/ceph-docker,JrCs/ceph-docker