The previous commit removed SkipMode from the testlib APi. This commit
removes the parameter from all calls to QSKIP.
Task-number: QTBUG-21851, QTBUG-21652
Change-Id: I21c0ee6731c1bc6ac6d962590d9b31d7459dfbc5
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>