Hardware components use old API

[christophfroehlich]

Background

All hardware components throw compile-time warnings like this one:

--- stderr: ros2_control_demo_example_4
/workspaces/ros2_rolling_ws/src/ros2_control_demos/example_4/hardware/rrbot_system_with_sensor.cpp: In member function ‘virtual hardware_interface::CallbackReturn ros2_control_demo_example_4::RRBotSystemWithSensorHardware::on_init(const hardware_interface::HardwareInfo&)’:
/workspaces/ros2_rolling_ws/src/ros2_control_demos/example_4/hardware/rrbot_system_with_sensor.cpp:38:49: warning: ‘virtual rclcpp_lifecycle::node_interfaces::LifecycleNodeInterface::CallbackReturn hardware_interface::SystemInterface::on_init(const hardware_interface::HardwareInfo&)’ is deprecated: Use on_init(const HardwareComponentInterfaceParams & params) instead. [-Wdeprecated-declarations]
   38 |     hardware_interface::SystemInterface::on_init(info) !=
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
In file included from /workspaces/ros2_rolling_ws/src/ros2_control_demos/example_4/hardware/include/ros2_control_demo_example_4/rrbot_system_with_sensor.hpp:28,
                 from /workspaces/ros2_rolling_ws/src/ros2_control_demos/example_4/hardware/rrbot_system_with_sensor.cpp:19:
/workspaces/ros2_rolling_ws/src/ros2_control/hardware_interface/include/hardware_interface/system_interface.hpp:226:26: note: declared here
  226 |   virtual CallbackReturn on_init(const HardwareInfo & hardware_info)
      |                          ^~~~~~~
---
Finished <<< ros2_control_demo_example_4 [0.14s]

The API of the hardware components changed a bit, and got deprecated with
ros-controls/ros2_control/issues/2344
For migration information, see also ros-controls/ros2_control#2412

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[vvkvijaykrishna]

Hello @christophfroehlich, can I work on this?

[christophfroehlich]

Fixed with #908