Incorporates debian/tests/ changes up to upstream/3.0.0-76-ge634555b61:
* Add autopkgtest for testing starting GUI
* Add missing autopkgtest dependencies
* Use automatic xvfb server number in tests
* Use GLX extension in autopkgtest, Qt needs it
* Install at-spi2-core in gui autopkgtest to avoid error messages
* debian/test/gui: Ignore stderr from wireshark-gtk since upstream deprecated it
* debian/tests/gui: Redirect stderr to stdout because Lua prints to stderr
* Stop shipping Wireshark's GTK+ GUI
Change-Id: I840fa17fb5ac2bc7b4fed36c4286ea97742f7369
Reviewed-on: https://code.wireshark.org/review/28519
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>