Due to unconditional waits this test always needed 120 seconds to pass.
Now we're using QTRY_VERIFY and make sure that we write the data before
the process got killed even in the cases 3 and 4.
On my machine this test now takes 8 seconds.
Change-Id: I606a8b43ba4c97704be5202a6c5d8d1c75337f9c
Reviewed-by: Bill King <bill.king@nokia.com>