lock network until all nodes are registered in fault tolerance test

[fabioDMFerreira]

Fixes

• Fault tolerance test Sharder goes down for 3 minutes simultaneously with coming up of the previous one

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: ...

[peterlimg]

Please merge staging code to avoid sharders load snapshot panic during system tests

[codecov-commenter]

Codecov Report

Merging #1851 (26d0e5a) into staging (01d2ccc) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           staging    #1851      +/-   ##
===========================================
- Coverage    26.86%   26.84%   -0.03%     
===========================================
  Files          356      356              
  Lines        59197    59197              
===========================================
- Hits         15904    15889      -15     
- Misses       41386    41409      +23     
+ Partials      1907     1899       -8     

Flag	Coverage Δ
Unit-Tests	26.84% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
...de/go/0chain.net/smartcontract/vestingsc/config.go	48.94% <0.00%> (-7.90%)	⬇️
...ain.net/smartcontract/storagesc/config_settigns.go	54.76% <0.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[peterlimg]

LGTM

[fabioDMFerreira]

@peterlimg the system tests are failing. I don't think the changes have any relation to the failure. Could you merge this PR?

[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	fix/fault-tolerance-tests-network-locking
blobber	staging
authorizer	staging
0box	staging
0block	staging
0dns	staging
explorer	master
0proxy	staging
0search	staging