Controller Manager should not crash when trying to start finalized or unconfigured controller

[destogl]

• Avoid crashing of controller manager when trying to start a controller in finalized or unconfigured state.

[destogl]

I need some help with tests. I am not really sure why they are failing.

[destogl]

We should also add tests for BEST_EFFORT controller switching in CM.

[bmagyar]

@Mergifyio backport foxy

[mergify]

Command backport foxy: failure

No backport have been created

• Backport to branch foxy failed: Git reported the following error:

Auto-merging controller_manager/test/test_load_controller.cpp
CONFLICT (content): Merge conflict in controller_manager/test/test_load_controller.cpp
Auto-merging controller_manager/src/controller_manager.cpp
error: could not apply 85f21c2... Controller Manager should not crash when trying to start finalized or unconfigured controller (#461)
hint: after resolving the conflicts, mark the corrected paths
hint: with 'git add <paths>' or 'git rm <paths>'
hint: and commit the result with 'git commit'