Fix blobber challenges

[Jayashsatolia403]

Changes

Fixes

Tests

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):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #1180 (537c1d4) into sprint-july-3 (54b3c2a) will not change coverage. The diff coverage is n/a.

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@@              Coverage Diff               @@
##           sprint-july-3    #1180   +/-   ##
==============================================
  Coverage          25.75%   25.75%           
==============================================
  Files                 80       80           
  Lines               9047     9047           
==============================================
  Hits                2330     2330           
  Misses              6426     6426           
  Partials             291      291           

Flag	Coverage Δ
Unit-Tests	25.75% <ø> (ø)

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