use a bulk update mode with passing a list of update

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-core/trunk@1476986 13f79535-47bb-0310-9956-ffa450edef68
add the bulk update bean

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-core/trunk@1476987 13f79535-47bb-0310-9956-ffa450edef68