Merge pull request #22283 from rjfd/wip-dashboard-user-roles

Merge pull request #22283 from rjfd/wip-dashboard-user-roles

mgr/dashboard: role based authentication/authorization system

Reviewed-by: Laura Paduano <lpaduano@suse.com>
Reviewed-by: Patrick Nawracay <pnawracay@suse.com>
Reviewed-by: Ricardo Marques <rimarques@suse.com>
Reviewed-by: Sebastian Wagner <swagner@suse.com>
Reviewed-by: Stephan Müller <smueller@suse.com>
Reviewed-by: Tatjana Dehler <tdehler@suse.com>
Reviewed-by: Volker Theile <vtheile@suse.com>