Make BUILDOUT-NEXT test suite use same setuptools version as master again
In 51740961 we "started testing new version of setuptools" and
BUILDOUT-NEXT test suite was set to use this
In !425 (merged) we started to depend on very recent setuptools and updated to 40.4.3 .
software/buildout-testing/software-next.cfg kept using this old setuptools and
BUILDOUT-NEXT test suite failed to build in a loop.
The test suite was already changed to use
software/buildout-testing/software.cfg (ie. it's same as
BUILDOUT but testing slapos.buildout's
next branch instead of
master ), so I think this profile is not needed currently.