* [NOD-1424] Write general unit-tests for Reachability
* Update the tests of reachabilityManager.
* Add a diagram for the created DAG in the test.
* Change tabs to spaces in the diagram.
Co-authored-by: karim1king <karimkaspersky@yahoo.com>
Co-authored-by: tal <tal@daglabs.com>
Co-authored-by: stasatdaglabs <39559713+stasatdaglabs@users.noreply.github.com>