Review Request 65396: Moved docker command check code inside health check library.

[Akash Gupta]

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https://reviews.apache.org/r/65396/
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Review request for mesos, Alexander Rukletsov, Andrew Schwartzmeyer, and Gaston 
Kleiman.


Bugs: MESOS-8498
    https://issues.apache.org/jira/browse/MESOS-8498


Repository: mesos


Description
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Now with the health check library refactor, the wrapping of `docker
exec` for docker command health checks can be easily moved inside
the library.


Diffs
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  src/checks/checker_process.cpp ddb197b8cc2c503fef5ae20af32f5881fff9833f 
  src/docker/executor.cpp e4c53d558e414e50b1c429fba8e31e504c63744a 


Diff: https://reviews.apache.org/r/65396/diff/1/


Testing
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make check


Thanks,

Akash Gupta