Revert "Revert "Added Shareclass function to ParseNav""

This reverts commit c313f454794fa069c7347e588566a045a31ef862
Revert "Revert """

This reverts commit 38d83d6ca92df86bad284449b7235995e5962de6
Re-added MTD commodity nav for share-class 

Signed-off-by: jsu <jsu@falconfone.com>