Comment 1 for bug 1569540

Also, I only used mandatory include as an arbitrary example. it could also be something lke this:

network_tests.pxu = network tests.
mandatory.pxu = mandatory tests.
storage.pxu = storage tests.

Then I could have something like this:

functional.pxu
include: mandatory.pxu, storage.pxu, network_tests.pxu
include:
info/a
info/b
miscellanea/c

and full.pxu
include: mandatory.pxu, storage.pxu, network_tests.pxu, stress.pxu