[x] I have provided test coverage for my change (where applicable)
Description
Closes #575 Rename sitedirectory to server administration, move user management to server administration
The user managment's view model was refactored to implement IDeprecatableDataItemTableViewModel
The component now inherits from SelectedDeprecatableDataItemBase, using the same pattern as Domains of Expertise, Organizations, etc. to display, deprecate and update to session events
…ctored and moved to server administration page
Prerequisites
Description
Closes #575 Rename sitedirectory to server administration, move user management to server administration