multisite: 'radosgw-admin sync error list' contains temporary EBUSY errors
Multisite sync encounters temporary EBUSY errors in normal operation, and will gracefully retry the operations until success. These temporary errors get written to the sync.error-log objects (visible via 'radosgw-admin sync error list').
The 'radosgw-admin sync error list' command should only contain actual sync errors that could require admin intervention. Including temporary EBUSY errors only serves to waste space in rados and obscure the more serious sync errors.