IBM Sales Exec Swainson to Become CA CEO  NEW YORK (Reuters) - Computer Associates International Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CA.N target=/stocks/quickinfo/fullquote"&gt;CA.N&lt;/A&gt; is set to name IBM sales executive John Swainson as  chief executive, completing a long search to replace indicted  former CEO Sanjay Kumar, industry sources said on Monday.