Fix `eventCollector` file path and increase `obstacleDetector` minimum distance

[mfussi66]

This PR is just a bugfix, it fixes the:

• wrong path in the eventCollector that would cause failure in saving the events file
• the minimum obstacle detection distance to 50cm. 10cm was way too little.
• the camera is launched with yarprobotinterface since the config file now has changed: it uses the key config <filename.ini>