Enable support for connecting to multiple spots with roscore and rosbridge

[nivlac12]

Currently, we can only connect to one at a time, because roscore uses system environment variables SPOT_CONN and SPOT_IP, which are overwritten when we source a different spot.

I've modified rosbridge so that we can run a second rosbridge on a different port (9091, instead of 9090)

• Are Oelsner

[nivlac12]

I'm looking into a way we can use different env variables at the same time. One potential option is to clone our docker container and run a separate container for each robot, which might be ok if they both refer to the same code.

Another could be changing the names of the env variables used depending on the robot we use, but it might be difficult to find every place where spot_conn and spot_ip are referred to.

• Are Oelsner