[7.14] [Security Solutions][Detection Engine] Fixes "undefined" crash for author field by adding a migration for it (#107230)#108221

Merged

FrankHassanabad merged 3 commits intoelastic:7.14from

FrankHassanabad:backport/7.14/pr-107230

Aug 11, 2021

Commits on Aug 11, 2021

[Security Solutions][Detection Engine] Fixes "undefined" crash for author field by adding a migration for it (#107230)
FrankHassanabad
committed
Fixed merge mistakes as the two test versions are very different
FrankHassanabad
committed
Fixes another area where the backport system is very different
FrankHassanabad
committed