[update] 相位倒计时优化8

signal-utc-dt-service/src/main/java/net/wanji/utc/dt/service/impl/DTSignalStatusServiceImpl.java

@@ -232,7 +232,7 @@ public class DTSignalStatusServiceImpl implements SignalStatusService {
                                         if (index == 0) {
                                             preStageId = phaseStageChain.get(phaseStageChain.size() - 1);
                                         } else {
-                                            preStageId = phaseStageChain.get(index);
+                                            preStageId = phaseStageChain.get(index - 1);
                                         }
                                         lightsStatusVO.setPhaseId(String.valueOf(preStageId));
                                         lightsStatusVO.setCyclePhaseCountDown(phaseStageStatusPojo.getRemainTime());