Testing: Move python3 tests to required #3187
Life time model: Atropos does not set the rule lifetime when –purge-replicas is used #3196
Recovery: Minos doesn’t handle properly ReplicaNotFound #3188
Recovery: Temporary unavailable files in bad_pfns not removed if processed after expiration date #3201
Clients: gfal stat does checksum calls for all checksums #3193