v21.04.15

Changelog

7e5a755 add check-conflict and dry-run (#381)
9a2dea0 add control number to identify
d0cd929 add override option for migrating script
2d8df47 add tests for lambda
9453d84 added Env in message Workload for #378 (#379)
4464cb0 always return errors to client
b5f324a avoid concurrent map writes (#380)
040d43c cleanup errors
95691bd complete [return workload id in async lambda]
4a39c3c feat: check calico weps which are dangling
6355281 ignore EOF error when reading from pipe
d5e8a01 init numa memory should be returned too (#383)
b003a3a lint
1f93621 minor revise lambda rpc func
7c2b347 optimize SelectVolumeNodes log
d067f77 redis migrate script (#388)
f7b4343 reduce unnecessary context.Background() (#384)
656c942 remove background context (#377)
766a9e0 return workload id in lambda (#385)
598dcf6 should be cancelled here (#390)
2350fdc should call this cancel to avoid goroutine leakage
d36ef79 some refines to make RunAndWait "run and wait"