-Added new Filemgr MetExtractor which expands a given metadata date time field out into multiple metadata fields (i.e. year, month, day, hour, minute, and second) to enable more fine tune queries.

git-svn-id: https://svn.apache.org/repos/asf/oodt/trunk@1591965 13f79535-47bb-0310-9956-ffa450edef68