AuditComponent implementation and fallout

- alf_prop_string_value now includes a CRC column and handles Oracle empty string issues
 - All property values are/must now be Serializable for auditing
 - Pushing data into audit is working


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@15915 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/audit/AuditSession.java

@@ -39,16 +39,6 @@ public class AuditSession
     private final String rootPath;
     private final Long sessionId;
     
-    /**
-     * Constructor used to denote a dummy (no-audit) session
-     */
-    /* package */ AuditSession()
-    {
-        application = null;
-        rootPath = null;
-        sessionId = null;
-    }
-    
     /**
      * @param application               the audit application config being used
      * @param rootPath                  the root path being used for the session