added namespace to controller manager

[mcbed]

Minor fix to allow CM to be run in the defined namespace, ref #122

[mcbed]

As impl_->model_nh_->get_namespace() returns the set namespace, do we still need to search for it in the sdf ?

gazebo_ros2_control/gazebo_ros2_control/src/gazebo_ros2_control_plugin.cpp

Lines 205 to 215 in a4bb81c

	// Set namespace if tag is present
	if (sdf->HasElement("namespace")) {
	std::string ns = sdf->GetElement("namespace")->Get<std::string>();
	// prevent exception: namespace must be absolute, it must lead with a '/'
	if (ns.empty() || ns[0] != '/') {
	ns = '/' + ns;
	}
	std::string ns_arg = std::string("__ns:=") + ns;
	arguments.push_back(RCL_REMAP_FLAG);
	arguments.push_back(ns_arg);
	}

[destogl]

@moutalibbadr @hugo-tardiou can you add this functionality to Ignition plugin, please? We should you exactly the same concept (or at least something very similar) there too.

[ahcorde]

should we backport this @destogl ?