Initial Commit of Ephemeral Message Support for System Admins (#8611)

Fixed Permission Test

Fixed and extended ephemeral message tests; Removed Online/Activity Updates

Set Create Time to current time

gofmt

app/app_test.go

@@ -195,6 +195,7 @@ func TestDoAdvancedPermissionsMigration(t *testing.T) {
 			model.PERMISSION_LIST_USERS_WITHOUT_TEAM.Id,
 			model.PERMISSION_MANAGE_JOBS.Id,
 			model.PERMISSION_CREATE_POST_PUBLIC.Id,
+			model.PERMISSION_CREATE_POST_EPHEMERAL.Id,
 			model.PERMISSION_CREATE_USER_ACCESS_TOKEN.Id,
 			model.PERMISSION_READ_USER_ACCESS_TOKEN.Id,
 			model.PERMISSION_REVOKE_USER_ACCESS_TOKEN.Id,
@@ -359,6 +360,7 @@ func TestDoAdvancedPermissionsMigration(t *testing.T) {
 			model.PERMISSION_LIST_USERS_WITHOUT_TEAM.Id,
 			model.PERMISSION_MANAGE_JOBS.Id,
 			model.PERMISSION_CREATE_POST_PUBLIC.Id,
+			model.PERMISSION_CREATE_POST_EPHEMERAL.Id,
 			model.PERMISSION_CREATE_USER_ACCESS_TOKEN.Id,
 			model.PERMISSION_READ_USER_ACCESS_TOKEN.Id,
 			model.PERMISSION_REVOKE_USER_ACCESS_TOKEN.Id,