Upgrade to Carla 0.9.10

[fnozarian]

Due to an issue with TrafficManager, a Carla server is started for the first instance of CARLASimulator and it is shared between all instances of CARLASimulator. In other words, all Envs have a shared simulator server. However, the simulator is reloaded with environment parameters each time a new environment is requested. This approach does not allow parallel running of the Carla servers and therefore different environments should be used sequentially only. Please also note that this patch should be applied to the Carla PythonAPI codes.