fix(httpdb): Set verifierSetAt for resetAccount()
fix(httpdb): Set verifierSetAt for resetAccount()

Currently we set `verifierSetAt` inside createAccount() but we didn't
for resetAccount(). This change mirrors that. Furthermore, the db-mem
and db-mysql backends set this field but that logic should be contained
here, rather than in the dumb backends.

chilts/fxa-auth-server,chilts/fxa-auth-server,jamonation/fxa-auth-server,jrgm/fxa-auth-server,mozilla/fxa-auth-server,dannycoates/picl-idp,eoger/fxa-auth-server,eoger/fxa-auth-server,mozilla/fxa-auth-server,jamonation/fxa-auth-server,dannycoates/picl-idp,shane-tomlinson/fxa-auth-server,eoger/fxa-auth-server,TDA/fxa-auth-server,mozilla/fxa-auth-server,TDA/fxa-auth-server,jamonation/fxa-auth-server,jrgm/fxa-auth-server,mozilla/fxa-auth-server,chilts/fxa-auth-server,dannycoates/picl-idp,dannycoates/picl-idp,jamonation/fxa-auth-server,shane-tomlinson/fxa-auth-server,shane-tomlinson/fxa-auth-server,eoger/fxa-auth-server,chilts/fxa-auth-server,jrgm/fxa-auth-server,TDA/fxa-auth-server,TDA/fxa-auth-server,shane-tomlinson/fxa-auth-server,jrgm/fxa-auth-server