commander: python3 fix

[v4hn]

There is certainly more, but this allows to use <group>\ngo <named_state>

[codecov-io]

Codecov Report

Merging #2030 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2030      +/-   ##
==========================================
+ Coverage   54.08%   54.09%   +0.01%     
==========================================
  Files         319      319              
  Lines       24997    24997              
==========================================
+ Hits        13519    13523       +4     
+ Misses      11478    11474       -4     

Impacted Files	Coverage Δ
...meterization/work_space/pose_model_state_space.cpp	82.99% <0.00%> (+0.68%)	⬆️
...anning_scene_monitor/src/current_state_monitor.cpp	52.82% <0.00%> (+1.53%)	⬆️

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[tylerjw]

Thank you for working on python3 compatibility. 👍 👍 👍

[tangent] Do you know if we could have our python tests run with python3 to find areas in our python code that need updated and keep them compatible?

[v4hn]

Thank you for working on python3 compatibility. +1 +1 +1

I don't have much of a choice, running on a python-3 based system 🗡️

[tangent] Do you know if we could have our python tests run with python3 to find areas in our python code that need updated and keep them compatible?

Once we have noetic CI set up, it's going to test for python 3 automatically.
That again still depends on a number of packages to be released for noetic (not just MoveIt).