- fix for OODT-726 Create MetFilter Task Example

git-svn-id: https://svn.apache.org/repos/asf/oodt/trunk@1615361 13f79535-47bb-0310-9956-ffa450edef68
- test remove multiple keys and add in docs.

git-svn-id: https://svn.apache.org/repos/asf/oodt/trunk@1615365 13f79535-47bb-0310-9956-ffa450edef68