eosbinary: do not use version folders for xattrs any longer #2752

Job	Run time
go	1m 13s
integration	1m 39s
docker (docker/Dockerfile.revad) / docker	1m 55s
docker (docker/Dockerfile.revad-eos) / docker	41s
docker (docker/Dockerfile.revad-eos) / docker	39s
docker (docker/Dockerfile.revad-ceph) / docker	1m 45s
docker (docker/Dockerfile.reva) / docker	32s
acceptance-1 / compose	1m 40s
acceptance-2 (1) / compose	5m 20s
acceptance-2 (2) / compose	9m 27s
acceptance-2 (4) / compose	5m 52s
acceptance-2 (3) / compose	6m 48s
acceptance-2 (5) / compose	5m 33s
acceptance-2 (6) / compose	8m 26s
litmus (litmus-1) / compose	2m 9s
litmus (litmus-2) / compose	1m 39s
	55m 18s

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