add legacy ros1 bag file

[Karsten1987]

~Needs https://github.com/ros2/rosbag2_bag_v2/pull/3~

Signed-off-by: osrf karsten@openrobotics.org

[Karsten1987]

This adds two demo bags in the resource folder which can be used for demo purposes. There is a ros2 bag file which contains plain ros2 recorded twist messages. The second bag file is a ros1 legacy bag file and can be replayed via the bridge and the rosbag2 v2 plugin. The tutorial markdown is enhanced to give some more insights on how to use these bags.

[mikaelarguedas]

I tried replaying the ROS1 and ROS2 bags and it worked for me :+1:

Steps I went through to get it running:

• Build ros1_bridge from source (due to https://github.com/ros2-gbp/ros1_bridge-release/issues/4)
• Build rosbag2_bag_v2 including https://github.com/ros2/rosbag2_bag_v2/pull/3
• Install rosbag2 and ros2bag
• cd into the confbot_driver/resources/ for the file to be found when running
• Install rosbag2_converter_default_plugins
• To get the ROS2 bag playing I had to install rosbag2_storage_default_plugins as well

We can aggregate all the debs to install in https://github.com/Karsten1987/roscon2018/issues/40? Have you considered a metapackage for all the "default" rosbag2 packages? Will rosbag2_bag_v2 be released in the next Dashing sync? or will users need to build it themselves? Should the bag files be installed ? (I dont believe so but just to make sure)

[mikaelarguedas]

Works for me, I'm going to merge this and iterate on the doc once this and https://github.com/Karsten1987/roscon2018/pull/19 are merged