Rework calcluation of behaviour sections

[gwehrle]

As described in Cui, 2017 the calculation of the behaviour sections should be changed like this:

1. set $v_{exit}$ (currently done in secureBreakingBehaviour) => braking section
2. set $v_{entry}$ => acceleration section
3. if $s_{acceleration} + s_{braking} > s_{characteristcsection}$ calculate maximum reached velocity $v_{reached}$
4. section between braking and acceleration is cruising section (or coasting section in the future)

Implemention should be seperate from defining characteristic sections.