test_classes: Compute history_public_to_subscribers correctly.
test_classes: Compute history_public_to_subscribers correctly.

We apparently missed updating this when we split out this database field.

showell/zulip,kou/zulip,brainwane/zulip,andersk/zulip,hackerkid/zulip,shubhamdhama/zulip,hackerkid/zulip,showell/zulip,brainwane/zulip,dhcrzf/zulip,brainwane/zulip,zulip/zulip,dhcrzf/zulip,tommyip/zulip,zulip/zulip,showell/zulip,eeshangarg/zulip,brainwane/zulip,kou/zulip,synicalsyntax/zulip,punchagan/zulip,andersk/zulip,hackerkid/zulip,kou/zulip,timabbott/zulip,rishig/zulip,rht/zulip,dhcrzf/zulip,tommyip/zulip,tommyip/zulip,eeshangarg/zulip,synicalsyntax/zulip,tommyip/zulip,shubhamdhama/zulip,synicalsyntax/zulip,shubhamdhama/zulip,andersk/zulip,jackrzhang/zulip,synicalsyntax/zulip,tommyip/zulip,showell/zulip,zulip/zulip,punchagan/zulip,jackrzhang/zulip,timabbott/zulip,brainwane/zulip,rishig/zulip,shubhamdhama/zulip,jackrzhang/zulip,brainwane/zulip,kou/zulip,timabbott/zulip,hackerkid/zulip,showell/zulip,rht/zulip,rht/zulip,dhcrzf/zulip,jackrzhang/zulip,rishig/zulip,kou/zulip,timabbott/zulip,eeshangarg/zulip,synicalsyntax/zulip,hackerkid/zulip,dhcrzf/zulip,rishig/zulip,tommyip/zulip,timabbott/zulip,rht/zulip,showell/zulip,hackerkid/zulip,andersk/zulip,timabbott/zulip,dhcrzf/zulip,eeshangarg/zulip,andersk/zulip,punchagan/zulip,zulip/zulip,kou/zulip,punchagan/zulip,timabbott/zulip,zulip/zulip,zulip/zulip,jackrzhang/zulip,rishig/zulip,rht/zulip,zulip/zulip,rht/zulip,jackrzhang/zulip,punchagan/zulip,jackrzhang/zulip,eeshangarg/zulip,rishig/zulip,eeshangarg/zulip,showell/zulip,brainwane/zulip,synicalsyntax/zulip,rht/zulip,punchagan/zulip,rishig/zulip,synicalsyntax/zulip,eeshangarg/zulip,punchagan/zulip,dhcrzf/zulip,shubhamdhama/zulip,hackerkid/zulip,kou/zulip,andersk/zulip,tommyip/zulip,andersk/zulip,shubhamdhama/zulip,shubhamdhama/zulip