[IntelliJ]The log will not show "job run successfully" when in Link Livy Cluster dialog, do not set “Yarn Endpoint”

[v-xiaocw]

Build: azure-toolkit-for-intellij-2018.1.PR.2202.10-08-2018
Repro Steps:
1.Right click on HDInsight ,select "Link A Livy Cluster"
2.Click the dropdown list of the "cluster info,"then select "Livy service",set up other items and leave "yarn endpoint" vacant.
3.Submit job to the linked cluster with the settings above
Result:

Expect:
Should show "Job run successfully" like below

[wezhang]

@lcadzy , could you help to verify it?

[v-jiche]

Still Repro.
Build: azure-toolkit-for-intellij-2018.2.71.10-31-2018

[jingyanjingyan]

Repro with develop 869

[jingyanjingyan]

Consider make the log more friendly.

[lcadzy]

After check,we find out once user dosen't fill the yarn endpoint when linking the livy cluster,we can't get the job log and result since these are based on the endpoint.