logilab-database #1485893 stop dropping tzinfo [validation pending]

if database is tz aware and return tz information, we should not remove it

priorityimportant
typebug
done in1.15.0
load3.000
load left0.000
closed by#0187bf306d97 stop dropping tzinfo attribute on datetime objects (closes #1485893)
patchstop dropping tzinfo attribute on datetime objects (closes #1485893) [applied]