chore(test): update layout gap test for 1 child
chore(test): update layout gap test for 1 child

atscott/flex-layout,atscott/flex-layout,angular/flex-layout,atscott/flex-layout,benbraou/flex-layout,benbraou/flex-layout,angular/flex-layout,atscott/flex-layout,benbraou/flex-layout,benbraou/flex-layout,angular/flex-layout,angular/flex-layout