fix(test): Sync reset password, verify different browser. (#4402)
fix(test): Sync reset password, verify different browser. (#4402)

With https://github.com/mozilla/fxa-auth-server/pull/1525, users that
sign in for Sync from the same IP address do not have to go through
signin confirmation. Update the test to reflect that.

fixes #4399 

r=@philbooth
shane-tomlinson/fxa-content-server,mozilla/fxa-content-server,mozilla/fxa-content-server,shane-tomlinson/fxa-content-server,shane-tomlinson/fxa-content-server,mozilla/fxa-content-server