Also I had to manually switch the camera IDs in the file voxl-camera-server.conf because the left and right cameras were swapped. The camera calibration tool was reporting a negative distance between cameras.
{
"name": "stereo",
"enabled": true,
"frame_rate": 30,
"type": "ov7251",
"camera_id": 1,
"camera_id_second": 0,
"independent_exposure": false,
"ae_desired_msv": 60,
"ae_filter_alpha": 0.600000023841858,
"ae_ignore_fraction": 0.20000000298023224,
"ae_slope": 0.05000000074505806,
"ae_exposure_period": 1,
"ae_gain_period": 1
}