Remove the Ignition install option from README (Will Not Run Create3_Sim)

[slowrunner]

For over a year it appears that new Create3 users following the Create3_sim README and choosing to install Ignition Gazebo have discovered IT DON'T WORK!.

(The issue was reported here, and with ROS-Control over a year ago, but there has been no action.)

Please remove the Ignition install option from the README until the issue is resolved.

To Reproduce

1. Follow the Ignition install
2. Launch: ros2 launch irobot_create_ignition_bringup create3_ignition.launch.py
3. Controller_Manager dies - Issue 194:

1702090266.5477965 [ERROR] [spawner-25]: process has died [pid 10052, exit code 1, cmd '/opt/ros/humble/lib/controller_manager/spaw
ner joint_state_broadcaster -c controller_manager --ros-args -r __ns:=/'].
1702090266.5570664 [INFO] [spawner-38]: process started with pid [10445]
1702090277.5307651 [ERROR] [spawner-38]: process has died [pid 10445, exit code 1, cmd '/opt/ros/humble/lib/controller_manager/spaw
ner diffdrive_controller -c controller_manager --ros-args -r __ns:=/ --params-file /home/ubuntu/wali_desk/c3ws/install/irobot_creat
e_control/share/irobot_create_control/config/control.yaml'].

(Or I guess if the work-around succeeds, add that to the README instead of removing Ignition option)

I'm so frustrated chasing this, reinstalling, trying different things I could think of and wasting a whole day on a "known for over a year" black hole.

Expected behavior Working Create3 Simulation in Ignition Freedom

[slowrunner]

Why did this Readme warning about Ignition not make it to main?

[aharshac]

Hello @slowrunner. Did you find a workaround?

I had the same (well I'm not a 100% sure) problem on Humble (Ubuntu 22.04) with Fast DDS. The same isn't found with Cyclone DDS.

Looks like there's an issue on ros2_control ros-controls/ros2_control#1200 with a probable fix ros-controls/ros2_control#1562
I was unable to build the fix branch locally, but I hope this PR will solve the problem.

[slowrunner]

Hello @slowrunner. Did you find a workaround?

No - stuck with classic.

[destogl]

Hello @slowrunner. Did you find a workaround?

I had the same (well I'm not a 100% sure) problem on Humble (Ubuntu 22.04) with Fast DDS. The same isn't found with Cyclone DDS.

Looks like there's an issue on ros2_control ros-controls/ros2_control#1200 with a probable fix ros-controls/ros2_control#1562 I was unable to build the fix branch locally, but I hope this PR will solve the problem.

We have fixed the issues in all supported distros. Still not released, but can be tested at least.

[aharshac]

@destogl It works now. Thanks for the fix!

[slowrunner]

Closing based on other's testing.