cubicweb #736303 Cubicweb "test" mode is detected to widely [resolved]

The "test" mode triggered by the APYCOT_ROOT environment variable is use in the case a tested project tries to use the system cubicweb.This may lead to various bugs

prioritynormal
typebug
done in3.8.0
load0.500
load left0.000
closed by<not specified>