Session.loadUser - remove Promise wrap
Session.loadUser - remove Promise wrap

getUserAuthorizations already returns a proper angular promise, from $http.get

for the other branch, adding back `$q` to return an angular promise

ManageIQ/manageiq-ui-service,ManageIQ/manageiq-ui-service,ManageIQ/manageiq-ui-service,ManageIQ/manageiq-ui-self_service,ManageIQ/manageiq-ui-self_service,ManageIQ/manageiq-ui-self_service