LDEV-3708: Unable to start a single activity lesson for a tool deployed after initial run as it was trying to find the learning_activity via the toolId when it should have been using the libraryId
LDEV-3697: Choosing user from autocomplete list displays results only for him/her. Entering generic query displays results for all matched users. Major clean up: rewrite methods for finding users and move them from UserManagementService to UserDAO.