remove collaborator

[boddumanohar]

Changes

• remove all collaborator related APIs from blobbers

Fixes 0chain/0chain#2010

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):

• 0chain:
• gosdk: clean up collaborator feature gosdk#713
• system_test: clean up collaborator feature system_test#510
• zboxcli: clean up: collab command zboxcli#341
• zwalletcli:
• Other: ...

[peterlimg]

LGTM

[peterlimg]

Please fix the conflicts

[codecov-commenter]

Codecov Report

Merging #944 (d2478ef) into staging (9047518) will increase coverage by 0.16%.
The diff coverage is 14.28%.

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@@             Coverage Diff             @@
##           staging     #944      +/-   ##
===========================================
+ Coverage    26.40%   26.56%   +0.16%     
===========================================
  Files           77       76       -1     
  Lines         7886     7648     -238     
===========================================
- Hits          2082     2032      -50     
+ Misses        5530     5350     -180     
+ Partials       274      266       -8     

Flag	Coverage Δ
Unit-Tests	26.56% <14.28%> (+0.16%)	⬆️

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/context.go	35.91% <ø> (+0.98%)	⬆️
...ain.net/blobbercore/handler/file_command_update.go	0.00% <0.00%> (ø)
.../go/0chain.net/blobbercore/handler/grpc_handler.go	12.37% <ø> (+2.53%)	⬆️
code/go/0chain.net/blobbercore/handler/handler.go	62.71% <ø> (-0.99%)	⬇️
...o/0chain.net/blobbercore/handler/handler_common.go	18.07% <ø> (-1.03%)	⬇️
.../0chain.net/blobbercore/handler/storage_handler.go	23.28% <0.00%> (+0.52%)	⬆️
...et/blobbercore/handler/object_operation_handler.go	31.53% <50.00%> (+0.44%)	⬆️
code/go/0chain.net/core/lock/lock.go	87.50% <0.00%> (-12.50%)	⬇️
...ain.net/blobbercore/handler/file_command_upload.go	40.66% <0.00%> (-1.34%)	⬇️
... and 1 more

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[service-0chain]

Manual system tests [success] with the following config

config	value
tests skipped	TRUE
system-tests	master
gosdk	NOT OVERRIDDEN
zboxcli	staging
zwalletcli	staging
0chain	staging
blobber	remove-collaborator
authorizer	staging
0box	staging
0block	staging
0dns	staging
explorer	master
0proxy	staging
0search	staging