WIP: recycle bin functionality for cephfs #311

Job	Run time
docker (docker/Dockerfile.revad) / docker	1m 28s
docker (docker/Dockerfile.revad-eos) / docker	58s
docker (docker/Dockerfile.revad-ceph) / docker	2m 23s
docker (docker/Dockerfile.reva) / docker	30s
docker (docker/Dockerfile.revad-eos) / docker	39s
	5m 58s

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