cicuit breaker position seems to be not deterministic

[nesnoj]

position changes with different runs - WTF

Related to #40, #97, #98

[nesnoj]

With mv routing only, the circuit breakers do not seem to change positions. After connection of satellites they seem to be shifted though. So next step is to check mv_connect.connect_node() what happens with the circuit breakers.
Proposal: The circuit breakers have to be relocated after connection of satellites (and stations?) -> a more general method (currently done during routing only) is required to determine the optimal position that can be called within routing and later on as well.

[nesnoj]

Done in f5745a6.
The circuit breaker positions are now recalculated with final grid (after routing, satellites + stations).