upgrade slf4j version

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1591518 13f79535-47bb-0310-9956-ffa450edef68
fix wrong relative path value

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1591519 13f79535-47bb-0310-9956-ffa450edef68
commons-configuration 1.10

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1591520 13f79535-47bb-0310-9956-ffa450edef68
fix removing registry listeners

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1591521 13f79535-47bb-0310-9956-ffa450edef68