--controls flag should be supported in all inspec commands

[aaronlippold]

@arlimus / @chris-rock : Support for the new --controls flag seems to have been left out for the other inspec subcommands.

My team is using the inspec json subcommand to parse out the elements of a profile for application integration and the ability to slice out specific controls would be very useful.

inspec json --controls="a b c"
inspec supermarket --controls=...
inspec compliance --controls=...
...

[arlimus]

👍 , we can tackle it for json fairly quickly ;)
We'll need to collect a list of all the places where this is relevant, but can get started with something as specific as json right away.

[aaronlippold]

I would say that json, then compliance then supermarket would be the right order. Given that would be the way the product line would want to grow the support.

[arlimus]

let's use your list:

• inspec json --controls a b c support --controls for inspec json #589
• inspec supermarket exec --controls a b c
• inspec compliance exec --controls a b c

[arlimus]

from cursory checking (@chris-rock is off right now) I can see controls support in both compliance and supermarket:

> inspec compliance help exec
Usage:
  inspec exec PROFILE
...
      [--controls=one two three]           # A list of controls to run. Ignore all other tests.

@aaronlippold please let me know if this isn't working, we should track it in a separate issue

[arlimus]

Covered all items. Please let us know if there is more to cover. If any of the existing methods have bugs, let's create new issues. Thank you @aaronlippold ! 👍