cubicweb #2502531 run cw & cube tests with nosetests [in-progress]

Which is a well-maintained performant tester.

prioritynormal
typeenhancement
done in<not specified>
load1.000
load left1.000
closed by<not specified>
patchAdjust testMatch in nose configuration to handle unittest_<xx>.py files [rejected]Remove hard dependency on pytest & allow nosetests to run [rejected]Configure nosetests to clear logging handlers [rejected]