Disable REST client requests logging in non-debug mode

INFO: 2009-02-09	09:05:06	0:0:0:0:0:0:0:1%0	-	0:0:0:0:0:0:0:1%0	8080	GET	/xwiki/rest/wikis/	-	200	206	-	550	http://localhost:8080	Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.6) Gecko/2009011912 Firefox/3.0.6	http://localhost:8080/xwiki/bin/view/Main/Test2
Feb 9, 2009 9:05:09 AM org.xwiki.rest.XWikiInitializationAndCleanupFilter beforeHandle
INFO: XWiki context initialized.
Feb 9, 2009 9:05:09 AM org.xwiki.rest.XWikiAuthentication checkSecret
INFO: Authenticated as 'Guest'.
Feb 9, 2009 9:05:09 AM org.xwiki.rest.XWikiResource init
INFO: Registering 'text/xml' representer for resource org.xwiki.rest.resources.spaces.SpacesResource
Feb 9, 2009 9:05:09 AM org.xwiki.rest.XWikiResource init
INFO: Instantiated and initialized resource org.xwiki.rest.resources.spaces.SpacesResource@5ba7a449
Feb 9, 2009 9:05:09 AM org.xwiki.rest.Utils cleanupResource
INFO: Releasing org.xwiki.rest.resources.spaces.SpacesResource@5ba7a449
Feb 9, 2009 9:05:09 AM org.xwiki.rest.XWikiInitializationAndCleanupFilter afterHandle
INFO: XWiki context cleaned up.
Feb 9, 2009 9:05:09 AM com.noelios.restlet.LogFilter afterHandle
INFO: 2009-02-09	09:05:09	0:0:0:0:0:0:0:1%0	-	0:0:0:0:0:0:0:1%0	8080	GET	/xwiki/rest/wikis/xwiki/spaces	undefined=null	200	1862	-	57	http://localhost:8080	Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.6) Gecko/2009011912 Firefox/3.0.6	http://localhost:8080/xwiki/bin/view/Main/Test2