[tests] Fix import error - sot_talos_balance.control_manager_conf

...on/sot_talos_balance/test/appli_COMTraj_sensorfeedback.py

...n/sot_talos_balance/test/appli_admittance_end_effector.py

python/sot_talos_balance/test/appli_dcmZmpControl.py

...n/sot_talos_balance/test/appli_dcmZmpControl_estimator.py

...on/sot_talos_balance/test/appli_dcmZmpControl_feedback.py

python/sot_talos_balance/test/appli_dcm_estimator.py

python/sot_talos_balance/test/appli_static_sensorfeedback.py

python/sot_talos_balance/test/test_COMTraj_tracer.py