Merged r9719, r9726, r9727 from trunk.
Merged r9701 from trunk.
Fixed test failures on wiki_page updated_on eager loading (#10996).
Fixed time zone issues introduced by r9719 (#10996).
Merged r9710 from trunk.
Merged r9711 from trunk.
Merged r9718 from trunk.
Merged r9712 from trunk.
Merged r9709 from trunk.
Merged r9699 from trunk.
