miners and sharders kill

[Sriep]

A brief description of the changes in this PR:

Tasks to complete before merging PR:

• [ ] Ensure system tests are passing. If not Run them manually to check for any regressions :clipboard:
• [ ] Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• [ ] Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• blobber:
• gosdk: https://github.com/0chain/gosdk/pull/502
• system_test:
• zboxcli:
• 0chain: https://github.com/0chain/0chain/pull/1454
• Other: ...