test(BsForm): adds failing test for pull request #766

[jelhan]

A test for BS4 is not needed cause inline=true only affects rendering an additional class for that one.

[simonihmig]

Thank you!

Btw, please don't use this conventional changelog style of PR titles (test(x): foo, feat(x): bar), but just plain human readable descriptions of the changes. The PR titles are used for automatic changelog generation (via lerna-changelog), when one of the supported labels has been applied (see https://github.com/kaliber5/ember-bootstrap/blob/master/package.json#L129-L133). Should probably add this to the Contributing.md! Fyi ;)