Add mock func for DevfileData interface

[maysunfaisal]

Signed-off-by: Maysun J Faisal maysunaneek@gmail.com

What does this PR do?

Adds mock funcs for the DevfileData interface via the mockgen tool

What issues does this PR fix or reference?

Fixes devfile/api#383

Is your PR tested? Consider putting some instruction how to test your changes

Yes, updated tests to use the mock data

[yangcao77]

Should the mock_interface be under testingutil pkg, instead of our production pkg?

[maysunfaisal]

@yangcao77 its usually kept in the same dir as the interface file. Thats the practice that I saw in online examples and odo as our close reference.

I'll check more tho, brb

[yangcao77]

@yangcao77 its usually kept in the same dir as the interface file. Thats the practice that I saw in online examples and odo as our close reference.

I'll check more tho, brb

Reasonable. If we have new interface for v3 in the future, we need to create matching mock funcs for new interface anyways.

[yangcao77]

Another thought on this PR:
Since GetDevfileContainerComponents and GetDevfileVolumeComponents are depracated functions, our library should switch to use GetComponents(common.DevfileOptions) instead

[yangcao77]

changes look good to me

[openshift-ci]

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