ATLAS-1281: audit logs should written only to audit.log and not application.log

typesystem/src/main/resources/atlas-log4j.xml

@@ -75,7 +75,7 @@
         <appender-ref ref="console"/>
     </logger>
 
-    <logger name="AUDIT">
+    <logger name="AUDIT" additivity="false">
         <level value="info"/>
         <appender-ref ref="console"/>
     </logger>

webapp/src/main/java/org/apache/atlas/web/filters/AuditFilter.java

@@ -88,8 +88,6 @@ public class AuditFilter implements Filter {
         final String whatURL = Servlets.getRequestURL(httpRequest);
         final String whatAddrs = httpRequest.getLocalAddr();
 
-        LOG.info("Audit: {}/{} performed request {} {} ({}) at time {}", who, fromAddress, whatRequest, whatURL,
-                whatAddrs, whenISO9601);
         audit(who, fromAddress, whatRequest, fromHost, whatURL, whatAddrs, whenISO9601);
     }