Add/conductor tests for blobber and validator

[lpoli]

Fixes

This PR resolves first two cases of issue 2559

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: Add/conductor tests for blobber and validator blobber#1195
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 50.00000% with 21 lines in your changes missing coverage. Please review.

Please upload report for BASE (sprint-1.11@1a63fd0). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...hain.net/smartcontract/storagesc/challenge_main.go	40.00%	9 Missing ⚠️
code/go/0chain.net/miner/protocol_block.go	68.42%	5 Missing and 1 partial ⚠️
code/go/0chain.net/chaincore/chain/worker.go	0.00%	4 Missing ⚠️
...ode/go/0chain.net/chaincore/chain/post_finalize.go	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@              Coverage Diff               @@
##             sprint-1.11    #2651   +/-   ##
==============================================
  Coverage               ?   28.50%           
==============================================
  Files                  ?      392           
  Lines                  ?    65744           
  Branches               ?        0           
==============================================
  Hits                   ?    18738           
  Misses                 ?    44762           
  Partials               ?     2244           

Flag	Coverage Δ
Unit-Tests	28.50% <50.00%> (?)

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[dabasov]

lgtm