As system, whenever importing Robot XML results, test level message/log should be stored in Test Run overall comment

As system, whenever importing Robot XML results, test level message/log should be stored in Test Run overall comment.

Thus, test run's comment should be filled with:

• the text inside the <msg> element contained within the <test> element, if present
• or else, the text inside the <status> element contained within the <test> element, if present

...
<test>
   <msg level="FAIL" >Error rate greater than 5 percent</msg>
  <status status="FAIL" starttime="20191016 17:55:46.019" endtime="20191016 17:55:47.634">used only if msg element not present</status>
</test>
...

The logic using the text within the <msg> or <status> elements of the parent <test> element as a fallback to populate the <kw> related message should be removed.