Merge PR #24805 into master

* refs/pull/24805/head:
	qa/suite: add dedup test
	src/tools: fix compile error (master version issue)
	src/tools: add stats (fixed objects,total objects)
	src/tools: make room for cdc
	src/tools: make enhacned stats and interface class
	src/tools: set timelimit and add signal handler to check progress
	src/tools: use the slice thing and make parallel (chunk_scrub)
	src/test: add max-thread test in test_dedup_tool.sh
	src/tools: use the slice thing and make parallel
	src/test: add chunk-scrub test in test_dedup_tool.sh
	src/tools: add chunk-scrub op in dedup tool
	src/cls/cas: add has_chunk op
	src/test: add test_dedup_tool.sh
	src/tools: initial works for dedup tool

Reviewed-by: Sage Weil <sage@redhat.com>

diff --cc ceph.spec.in
Simple merge