Return value instead of sys.exit() if an exception occurs
RelatedChange: I4ca91e3b519a99f3096b95b286779a183e936eb7
Change-Id: I9ebbf5b9f4216c3eab5ab42a0014a750ca28980b
Moving bin script of swift-recon-cron to cli module
for unittest
Delete unused `logger` parameter in get_async_count function
Partial-Bug: #1743656
Change-Id: I4ca91e3b519a99f3096b95b286779a183e936eb7