message: raise limit for ERROR_UNBALANCED_PHASES
  See
diff: @@ -444,7 +444,7 @@ bool Motor::measure_phase_resistance(float test_current, float max_voltage) {
  }
  float I_beta = control_law.get_Ibeta();
  - if (is_nan(I_beta) || (abs(I_beta) / test_current) > 0.1f) {
  + if (is_nan(I_beta) || (abs(I_beta) / test_current) > 0.2f) {
  disarm_with_error(ERROR_UNBALANCED_PHASES);
  success = false;
  }
  