propagate a portion of global args to the controller nodes for remapping to work

[saikishor]

Fixes: #1711

[codecov]

Codecov Report

Attention: Patch coverage is 53.57143% with 13 lines in your changes missing coverage. Please review.

Project coverage is 86.73%. Comparing base (ecfec15) to head (7dc85a8).
Report is 1 commits behind head on master.

Files	Patch %	Lines
controller_manager/src/controller_manager.cpp	42.85%	11 Missing and 1 partial ⚠️
controller_manager/src/ros2_control_node.cpp	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1712      +/-   ##
==========================================
- Coverage   86.81%   86.73%   -0.09%     
==========================================
  Files         116      116              
  Lines       10600    10618      +18     
  Branches      975      978       +3     
==========================================
+ Hits         9202     9209       +7     
- Misses       1048     1058      +10     
- Partials      350      351       +1     

Flag	Coverage Δ
unittests	86.73% <53.57%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
.../include/controller_manager/controller_manager.hpp	100.00% <ø> (ø)
controller_manager/src/ros2_control_node.cpp	88.23% <85.71%> (-1.06%)	⬇️
controller_manager/src/controller_manager.cpp	77.41% <42.85%> (-0.67%)	⬇️

[christophfroehlich]

Successfully tested with the demos, thanks for the quick fix!