minor changes to error msgs
When a docid's access policy is modified with metacat native api, update CN with the new access policy
Add a note to the administrator to tell the name format of groups and users.
Change to use AuthFile constructor.
Add code to check if groups is null.
Sync access policy between mn -> cn in case where metacat native ui being used to update ap on mn
Consolidate the user/group utitlities code.
Change the element name in the user from "group" to "memberof".Fixed a bug that in groupadd.
Add methods to handle modify user's attributes.
Also available in: Atom