cubicweb #1568456 login parameter should be mandatory for cubicweb.dpapi.connect [deprecated]

For instance, the following error in code lead to an error related to authentification instead of a parameter error:

from cubicweb import dbapi
cnx = dbapi.connect( 'my_cube', user='admin', password='admin' )

prioritynormal
typebug
done in<not specified>
load0.000
load left0.000
closed by<not specified>