Migrate multiple commits from OpenDistro Kibana report#57

Merged

zhongnansu merged 3 commits intodevfrom patch-csv-fix

May 24, 2021

+86-46

Commits on May 18, 2021

Pass processing if doc[field] == null (#361 )

uzhinskiy
authored and
zhongnansu
committed

Commits on May 21, 2021

add test case for commit 368eb03e200b755870f1ad373e67561201ab6f31 (#370)
zhongnansu
committed
Unhash page url in case store URLs in session storage is enabled from Kibana advanced setting (#371 )
zhongnansu
committed