Fixed node not shutting down, if sensor stream breaks (ROS2)

[amelhassan]

Fixes #181

Description of the changes:

• This is the ROS2 equivalent change for PR #183: "Currently the node will break silently if the camera stops sending data. This happens as it blocks infinite in get_capture. This commit reduces the timeout to 5 times the expected time it would normally take for a new frame to arrive. For unknown reasons, the first frame takes way longer to arrive, therefore we wait up to four seconds for the first frame."

Required before submitting a Pull Request:

• [x] I reviewed CONTRIBUTING.md
• [x] I built my changes locally
• [x] I tested my changes with a device
• [x] I changed both the ROS1 and ROS2 branches

I tested changes on:

• [ ] Windows
• [x] Linux
• [ ] ROS1
• [x] ROS2

Manual testing