Merge PR #22423 into master

Merge PR #22423 into master

* refs/pull/22423/head:
	common/blkdev: fix non-linux build for get_device_id
	common/blkdev: do not include vendor in fallback mode
	mgr: allow open-ended life expectancy
	mgr: use prettified durations for life expectancy
	common/ceph_time: very lame timespan_str() helper
	mgr: "predicted failure" -> "life expectancy", and as a range
	mgr: detailed output for 'ceph device ...'
	mgr/DaemonState: skip blank device_ids
	osd: skip blank device ids
	mgr: track and report device names too
	mgr/ActivePyModule: expose 'devices' to python modules
	mgr: move dump/print to DeviceState
	mgr: implement 'device {set,rm}-predicted-failure' commands
	mgr: load persistent device metadata on mgr stat
	include/utime: add parse() method
	mgr: tolerate racing config-key change during load_store()
	mgr: implement 'device {ls,ls-by-daemon,ls-by-host,info}' commands
	mgr/DaemonState: populate DeviceState structures
	mgr: parse out devids from daemon metadata
	common/blkdev: add modelines
	osd: include device_ids in metadata
	common/blkdev: add get_device_id() helper.

Reviewed-by: Erwan Velu <erwan@redhat.com>
Reviewed-by: Willem Jan Withagen <wjw@digiware.nl>