Merge branch 'master' of ssh://gitlab.aicrowd.com/flatland/flatland into 169-Enhance_sparse_rail_generator

Resolve "benchmarks_and_profiling: The script exceeded the maximum execution time set for the job"

Closes #175

See merge request flatland/flatland!189

Update flatland_2.0.md for a minor typo

See merge request flatland/flatland!188

Merge branch 'master' of gitlab.aicrowd.com:flatland/flatland into 175-no-sleep-when-running-examples-as-benchmark-or-profiling

calculate number of graphs (connected segemts) if more than one -> connect them to get a fully networked system