fix(query_content_test): s/test/group/
fix(query_content_test): s/test/group/

This fails on travis with "Bad state: Can't call group() once tests have begun running." This is because the testContentChildren() call itself defines groups.

PiperOrigin-RevId: 177613415

matanlurey/angular,angulardart/angular,angulardart/angular,chalin/angular2,angulardart/angular,matanlurey/angular,chalin/angular2,matanlurey/angular,kevmoo/angular,kevmoo/angular,kevmoo/angular,chalin/angular2