Filter getBlobbers and getValidators for is_killed and is_shutdown

[Sriep]

Fixes

Changes

Need to be mentioned in CHANGELOG.md?

Tests

Tasks to complete before merging PR:

• Ensure system tests are passing. If not Run them manually to check for any regressions 📋
• 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:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #2316 (d1e46b4) into staging (9dbb892) will increase coverage by 0.01%.
The diff coverage is 0.00%.

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@@             Coverage Diff             @@
##           staging    #2316      +/-   ##
===========================================
+ Coverage    28.97%   28.98%   +0.01%     
===========================================
  Files          377      377              
  Lines        63065    63076      +11     
===========================================
+ Hits         18271    18285      +14     
+ Misses       42648    42639       -9     
- Partials      2146     2152       +6     

Flag	Coverage Δ
Unit-Tests	28.98% <0.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...e/go/0chain.net/smartcontract/dbs/event/blobber.go	32.13% <0.00%> (-0.69%)	⬇️
...go/0chain.net/smartcontract/dbs/event/validator.go	35.82% <0.00%> (-1.11%)	⬇️

... and 3 files with indirect coverage changes

[peterlimg]

LGTM