formatter: output format 'recjson' addition

(addresses #1908)

Signed-off-by: Eirini Psallida <eirini.psallida@cern.ch>
23:1: F403 'from sqlalchemy import *' used; unable to detect undefined names
24:1: F401 'db' imported but unused
26:1: F401 'op' imported but unused
27:1: F401 'wait_for_user' imported but unused