Upgrade Issue (12.02) Pausing task until to timeout

[zfxzf0421]

#5983 Will cause an upgrade issue.
It remove a parameter resume(this is should always true).
https://github.com/apache/incubator-druid/pull/5983/files#diff-6ceeb9607fd4d7a73bdac826dd010193L323

But in the previous version.
https://github.com/apache/incubator-druid/pull/5983/files#diff-83c0b637b5e4ea97b13a1e95b7b0a601L1477
The default value of http post 'resume' is false.

So when we upgrade the overload before middle manager, it will cause all task pausing until timeout.

I think you should declare this issue in
http://druid.io/docs/latest/operations/rolling-updates.html

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[stale]

This issue has been marked as stale due to 280 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If this issue is still relevant, please simply write any comment. Even if closed, you can still revive the issue at any time or discuss it on the dev@druid.apache.org list. Thank you for your contributions.

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