[Feature] Decommission datapartitions, disks and datanodes automatically

[tomscut]

Signed-off-by: Tao Li tomscut@apache.org

What this PR does / why we need it:
Decommission datapartitions, disks and datanodes automatically.

1. This feature is disabled by default, we can enable it by API /cluster/autoDecommission.
2. Automatically decommission the datanodes in stale state. A datanode in stale state typically has no heartbeat for more than a certain amount of time.
3. Automatically decommission baddisks.
4. Automatically decommission lackPartitions.
5. Provides APIs /admin/getDecommissionDatanodes and /admin/getDecommissionDisks to query datanodes and disks are decommissioning or decommissioned.

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[leonrayang]

hi @tomscut , this pr has conflicts with the master branch, and we'll release version 3.2.1 this week, the master branch need be protected util it's released, so please fix the conflict after the release and we'll review it again.

[tomscut]

hi @tomscut , this pr has conflicts with the master branch, and we'll release version 3.2.1 this week, the master branch need be protected util it's released, so please fix the conflict after the release and we'll review it again.

Ok. I will fix the conflict later. Thanks.