Sun Micro Agrees to Buy Closely Held SevenSpace  SAN FRANCISCO (Reuters) - Sun Microsystems Inc. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=SUNW.O qtype=sym infotype=info qcat=news"&gt;SUNW.O&lt;/A&gt;  has agreed to acquire closely held SevenSpace Inc., adding to  Sun's managed services offerings, the network computer maker  said on Monday.