Oracle Ruling May Embolden Dealmakers  WASHINGTON (Reuters) - A federal judge may have sent a gift  to all merger-minded U.S. executives when he rejected the  government's request to block Oracle Corp.'s &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ORCL.O target=/stocks/quickinfo/fullquote"&gt;ORCL.O&lt;/A&gt; bid for  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; last week.