ticket-1610 Fixed - Loop worker doesn't receive connected chains

[sergiy-skalelabs]

Fixed issue related to 1 hour delay until S2S transfer really start to perform. This happen because SNB worker downloads array of connected chains too fast, broadcasts it to loop worker threads earlier than loop worker threads started.

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (5256b5e) 85.79% compared to head (dbd1079) 85.79%.

:exclamation: Current head dbd1079 differs from pull request most recent head 56c2c3e. Consider uploading reports for the commit 56c2c3e to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1611 +/- ## ======================================== Coverage 85.79% 85.79% ======================================== Files 26 26 Lines 1464 1464 Branches 401 401 ======================================== Hits 1256 1256 Misses 33 33 Partials 175 175 ```

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