Steven Page did his best to put the Barenaked Ladies behind him at Friday night’s National Arts Centre gig. But opening for those power ballad pinups the Goo Goo Dolls, it was a one step forward, two steps back kind of affair, with a set that would alternate, perhaps too easily, between the Page that fronted the “If I Had a Million Dollar” pranksters, and the new, more mature solo artist. But no one said that transition would be easy. The driving creative force behind the Ladies until 2009, Page remains a rambunctiously entertaining frontman as well as a ferociously clever