logilab-common #280757 legacy tracing hacks of pytest inhibates coverage [validation pending]

see http://blog.unlish.com/2014/11/nose-coverage-and-cubicweb.html

prioritynormal
typebug
done in0.63.1
load left0.000
closed by#31725b8fa3f5 [coverage] Provides better tools to pause tracing
patch[coverage] Provides better tools to pause tracing [applied]