BUG: fix get_controller_observed_variables in the air brakes examples
#1374
| Job | Run time |
|---|---|
| 5m 29s | |
| 9m 56s | |
| 10m 32s | |
| 11m 8s | |
| 6m 53s | |
| 10m 10s | |
| 15s | |
| 54m 23s |