Fix initial spawn of pedestrian speed

[faizansana]

intersection-carla-gym/src/carla_env_custom.py

Line 686 in 19b9d05

walker_controller_actor.set_max_speed(1 + random.random()) # max speed between 1 and 2 (default is 1.4 m/s)

Currently, the pedestrian speeds are between 1 to 2 m/s and not 0.5 - 2 m/s which would be a better representation.