[SD-1240] Only empty stages can be deleted
fix(sync): sync without celery
[SD-1240] Only empty stages can be deleted - test improvements
Merge pull request #436 from petrjasek/fix-sync

fix(sync): check if item is still in mongo when syncing
Merge pull request #450 from akintolga/master

[SD-1240] Only empty stages can be deleted
assign task statuses to desk stages
assign task statuses to desk stages: optimization
Merge pull request #455 from mugurrus/master

SD-1289 Backend functionality for assigning task statuses to desk stages
[SD-1292] Add privileges to Activity resource
Merge remote-tracking branch 'remotes/upstream/master'