Re-enable Active Layer Transfer Tests

[gselzer]

imagej-legacy seems to modify the behavior of Display.close(), likely through DisplayDeletedEvent, and I've put a great deal of effort without results into trying to get Display.close() to actually remove the display from DisplayService.getDisplays(). So, for now, since I know it works in practice, I'm disabling these tests in #151 when ImageJ Legacy is enabled.

But we should re-enable them once Display.close() is fixed, which will require upstream changes/releases.

[ctrueden]

@gselzer Is this intended for 0.1.0, or 1.0.0? Right now it is in the former's project column, but the latter's milestone.

Also, what exactly needs to be done, in which upstream component(s)?

[gselzer]

@ctrueden it's intended for 1.0.0/never.

Looking at my initial comment, it looks like we need a fix in imagej-legacy. I don't remember what I was trying earlier...