Evaluate check hooks

[Matthew Franglen]

https://blog.sensuapp.org/using-check-hooks-a739a362961f

https://docs.sensu.io/sensu-core/1.2/reference/checks/#check-hooks

[matthewfranglen]

This evaluation has failed.

• I can define the hook definition in both standalone and subscription checks.
• I cannot see the stdout of the check hook command (tested with non-zero and 1 status codes for the command /bin/false)
• I cannot see the side effects of the hook command (tested with touch /tmp/fooo)