Restore DateParser to core

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1085@1634303 13f79535-47bb-0310-9956-ffa450edef68
Ooops missed a package

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1085@1634304 13f79535-47bb-0310-9956-ffa450edef68