allow configuring rail_crossing parameters (trac #2062)

[behrisch]

Migrated from http://sumo.dlr.de/ticket/2062

{
    "status": "assigned", 
    "changetime": "2016-10-14T10:39:37Z", 
    "description": "", 
    "reporter": "namdre", 
    "cc": "", 
    "resolution": "", 
    "_ts": "1476441577749276", 
    "component": "simulation data input", 
    "summary": "allow configuring rail_crossing parameters", 
    "priority": "major", 
    "keywords": "", 
    "time": "2015-12-08T12:15:44Z", 
    "milestone": "1.0.0", 
    "owner": "namdre", 
    "type": "enhancement"
}

• load junction parameters from net.xml
• load tlLogic parameters from additional (re-init paramters after constructor)
• set parameter via TraCI (re-set members)

[behrisch]

• @namdre changed milestone from "0.26.0" to "0.27.0"
• @namdre changed owner from "" to "namdre"
• @namdre changed status from "new" to "assigned"

[behrisch]

@behrisch changed milestone from "0.28.0" to "0.29.0"

[behrisch]

still needs tests for all parameters except time-gap and also for setting the parameters in the net or via traci instead of using an additional file

[behrisch]

docs are missing too @rummel123 Can you help here (and with the tests)?

[namdre]

docs were added in the meantime.