给系统参数表增加更新单价启用标记，默认开启

jshERP-boot/src/main/java/com/jsh/erp/service/systemConfig/SystemConfigService.java

@@ -200,6 +200,23 @@ public class SystemConfigService {
         return minusStockFlag;
     }
 
+    /**
+     * 获取更新单价开关
+     * @return
+     * @throws Exception
+     */
+    public boolean getUpdateUnitPriceFlag() throws Exception {
+        boolean updateUnitPriceFlag = true;
+        List<SystemConfig> list = getSystemConfig();
+        if(list.size()>0) {
+            String flag = list.get(0).getUpdateUnitPriceFlag();
+            if(("0").equals(flag)) {
+                updateUnitPriceFlag = false;
+            }
+        }
+        return updateUnitPriceFlag;
+    }
+
     /**
      * 获取强审核开关
      * @return