[Spawner] Accept parsing multiple --param-file arguments to spawner

[saikishor]

When we use multiple controlers to activate or deactivate, it is quite cumbersome to accept only one --param-file arg as it is not very scalable. For this reason, now the spawner can accept multiple --param-file args and set the respective param_file to those corresponding controllers.

Along with the above mentioned change, now the controllers can accept multiple param-file args as well, and this is very helpful to be able to override parameters between parameter files as how it is done with the standard ROS 2 nodes

[codecov]

Codecov Report

Attention: Patch coverage is 74.63768% with 35 lines in your changes missing coverage. Please review.

Project coverage is 87.53%. Comparing base (b0da4a1) to head (11626cd).

Files with missing lines	Patch %	Lines
...troller_manager/controller_manager/launch_utils.py	0.00%	19 Missing ⚠️
.../controller_manager/controller_manager_services.py	80.00%	5 Missing and 5 partials ⚠️
controller_manager/controller_manager/spawner.py	57.14%	1 Missing and 2 partials ⚠️
controller_manager/src/controller_manager.cpp	70.00%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1805      +/-   ##
==========================================
- Coverage   87.60%   87.53%   -0.08%     
==========================================
  Files         120      120              
  Lines       12223    12311      +88     
  Branches     1093     1109      +16     
==========================================
+ Hits        10708    10776      +68     
- Misses       1125     1143      +18     
- Partials      390      392       +2     

Flag	Coverage Δ
unittests	87.53% <74.63%> (-0.08%)	⬇️

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

Files with missing lines	Coverage Δ
controller_manager/controller_manager/__init__.py	100.00% <ø> (ø)
controller_manager/test/test_spawner_unspawner.cpp	99.36% <100.00%> (+0.11%)	⬆️
controller_manager/controller_manager/spawner.py	72.22% <57.14%> (+0.44%)	⬆️
controller_manager/src/controller_manager.cpp	78.11% <70.00%> (+0.15%)	⬆️
.../controller_manager/controller_manager_services.py	74.50% <80.00%> (-0.12%)	⬇️
...troller_manager/controller_manager/launch_utils.py	0.00% <0.00%> (ø)

[christophfroehlich]

Seems to be a good idea, and implementation LGTM.

Please update the doc section and release notes.

[saikishor]

Seems to be a good idea, and implementation LGTM.

Please update the doc section and release notes.

@christophfroehlich Done

[christophfroehlich]

Thx :)

[mergify]

This pull request is in conflict. Could you fix it @saikishor?