username aliases aren't updated when displaying previous commits in activity (BB-3554)

Hi all ,

I met a problem about username alias just now.

I have two accounts below :

EragonJ - with 2 email ( eragonj@hax4.in , eragonj@eragonj.me )

and

Hax4 - with 1 email ( admin@hax4.in )

Originally ,

I used eragonj@hax4.in to register Hax4 account at first for test, but later , I decided to make a primary email for it ( which is admin@hax4.in )

And also ,

My original email account is eragonj@eragonj.me , but because of concurrent development with teammates, I decided to add another email with hax4.in suffix to my account ( that is eragonj@hax4.in )

After I changed both emails of two accounts ( account hax4 : from eragonj@hax4.in to admin@hax4.in , and my personal account EragonJ : from eragonj@eragonj.me to eragonj@hax4.in ), I tried to make some new commits with new email identification :

{{{
#!bash

git config --add user.email "eragonj@hax4.in"
}}}

But problems happened !!

After I made new commits with this identification , the commit maker links to original hax4 account !!! This may be a caching issue or some bugs in account alias, please dig it out if you guys have some spare time

Thanks for your reading