Add Regressiontest to verify no default import order style is applied

[JohannisK]

Add a test verifying the changes in #573

The recipe used to pick a default import order style, in the PR a change was merged so no default import order style is picked.

This change still needs a unit test to verify.

[LakshyaKwatra]

Hi @timtebeek I have added the unit test for the verification of the same as a part of this PR: #597
Please do have a look. Thanks!

[timtebeek]

Thanks a lot! I'm out these couple days, but hopefully @JohannisK can already have a look.