Fix/heathcheck

[cnlangzi]

Changes

Fixes

• fixed gorm tag issue on MinStake
• fixed HealthCheck sc seems be broken #708: send healtcheck in background

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):

[codecov-commenter]

Codecov Report

Merging #718 (fc3a43d) into staging (7b9053d) will increase coverage by 0.11%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           staging     #718      +/-   ##
===========================================
+ Coverage    24.06%   24.18%   +0.11%     
===========================================
  Files           69       69              
  Lines         7957     7907      -50     
===========================================
- Hits          1915     1912       -3     
+ Misses        5757     5710      -47     
  Partials       285      285              

Flag	Coverage Δ
Unit-Tests	24.18% <0.00%> (+0.11%)	⬆️

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

Impacted Files	Coverage Δ
code/go/0chain.net/blobbercore/handler/health.go	0.00% <0.00%> (ø)
code/go/0chain.net/blobbercore/handler/protocol.go	0.00% <0.00%> (ø)
...et/blobbercore/handler/object_operation_handler.go	32.44% <0.00%> (-0.29%)	⬇️
...ode/go/0chain.net/blobbercore/allocation/entity.go	0.00% <0.00%> (ø)
...e/go/0chain.net/blobbercore/allocation/protocol.go	0.00% <0.00%> (ø)

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[dabasov]

it's better to avoid if-then-else and replace themwith if-not-then
it's easy to read something like

if err != nil {
    //some code
    return 
}

//other code

then

if err == nil {
    //some code
} else {
    //other code
}

[cnlangzi]

fixed

[dabasov]

lgtm