Decrease queue size of frame buffer

[weizhuowang]

I'm experiencing a lot of lag issues (D435 point cloud <-> T265 odom >300ms). While working on it, I stumbled upon this thread. Looks like there is a frame buffer variable somewhere in the librealsense code. I was wondering how realsense-ros is handling this buffer capacity and is there anyway that I can modifiy this value? Btw I'm already using 1 for the pointcloud subscriber queue size.