DatabaseHandle :: DeleteWorkspace - Delete workspace
The function deletes an existing workspace. The workspace must be empty before deleting, i.e. discard or consolidate must run before.
Return value:  Success ( logical  )
Implementation details
logical 
DatabaseHandle  :: DeleteWorkspace ( NString &ws_name, NString &user_name_w )
- ws_name
 - Workspace name
The workspace name is the extension of the current workspace or database. The database can be considered as the root for all workspaces. The workspace name may address a workspace on top of the current one (simple workspace name) or a workspace on any higher level by passing a sequence of workspace names separated by '.'. 
- user_name_w - User name

