fix(版本对比): 解决功能用例创建新版本后立即对比报错的问题

--user=郭雨琦
--bug=1013781
功能、场景新建后，版本对比报错
https://www.tapd.cn/55049933/bugtrace/bugs/view/1155049933001013781

frontend/src/business/components/track/case/components/TestCaseEdit.vue

@@ -980,11 +980,10 @@ export default {
             that.oldData = data[1].data.data;
             that.newData.createTime = row.createTime;
             that.oldData.createTime = this.$refs.versionHistory.versionOptions.filter(v => v.id === that.oldData.versionId)[0].createTime;
-            let testCase = that.versionData.filter(v => v.versionId === this.currentTestCaseInfo.versionId)[0];
             that.newData.versionName = that.versionData.filter(v => v.id === that.newData.id)[0].versionName;
             that.oldData.versionName = that.versionData.filter(v => v.id === that.oldData.id)[0].versionName;
             that.newData.userName = response.data.createName
-            that.oldData.userName = testCase.createName
+            that.oldData.userName = that.versionData.filter(v => v.id === that.oldData.id)[0].createName
             this.setSpecialPropForCompare(that);
             that.dialogVisible = true;
           }

frontend/src/business/components/track/case/version/TestCaseVersionDiff.vue

@@ -322,7 +322,7 @@ export default {
     this.open("oldData");
     this.open("newData");
     this.$nextTick(function () {
-      setTimeout(this.getDiff,(this.$refs.old.$children.length+1)*1000)
+      setTimeout(this.getDiff,(this.$refs.old.$children.length+1)*1500)
     })
   },
   methods: {