logilab-database #2777713 make sqlite tz datetime aware [validation pending]

this is needed for proper tz datetime support in cubicweb.

prioritynormal
typeenhancement
done in1.15.0
load3.000
load left0.000
closed by#b639b12aaf38 [sqlite] add support for tz-aware datetime (closes #2777713)
patch[sqlite] add support for tz-aware datetime (closes #2777713) [applied]