Changelog:
===========
- Prevent bad task serialization in schedule from causing a batch of tasks to be lost
- Ensure we catch ResultTimeout which may occur when used with Sentinel
- Remove junk SQS implementation I was testing out.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
