Stocks Seen Higher, Oracle Could Help  NEW YORK (Reuters) - U.S. stocks were set for a higher open  on Monday, helped by news business software maker Oracle Corp.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ORCL.O target=/stocks/quickinfo/fullquote"&gt;ORCL.O&lt;/A&gt; struck a deal to buy rival PeopleSoft Inc.&lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PSFT.O target=/stocks/quickinfo/fullquote"&gt;PSFT.O&lt;/A&gt;,  ending a bitter takeover battle.