[C++] Implement DoPut command for Flight on client and server side

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This was omitted from ARROW-3146

Reporter: Wes McKinney / @wesm
Assignee: David Li / @lidavidm

PRs and other links:

• GitHub Pull Request #3524

_{Note: This issue was originally created as ARROW-3289. Please see the migration documentation for further details.}

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David Li / @lidavidm:
I can take on this next, seeing as I've been digging around the relevant parts anyways, and then update the integration tests to cover uploads.

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Wes McKinney / @wesm:
That sounds great – the Java test server supports storing a dataset, then retrieving it. I figure you would implement similar functionality in order to test this

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David Li / @lidavidm:
Yup - the current integration tests I have written write the data back out to a file, but with the put side implemented, it can/should just stay in memory.

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David Li / @lidavidm:
I have an initial implementation ready now; waiting on ARROW-4213 to be reviewed first though.

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Wes McKinney / @wesm:
I'll review ARROW-4213 today so we can get that merged soon, thank you for your patience

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David Li / @lidavidm:
No rush, thank you for your time!

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Antoine Pitrou / @pitrou:
Issue resolved by pull request 3524
#3524