METALS-Firm dollar lifts copper; nickel, aluminium edge up

SYDNEY, Oct 10 (Reuters) - London copper pushed higher on Tuesday after stagnating overnight, buoyed by a steady dollar and a modest uplift in Chinese futures. Chinese nickel and aluminium futures also edged up, ignoring a steep drop in Shanghai steel prices. "Both metals (nickel and aluminium) are expected to see production output curtailed in the coming weeks on environmental grounds as the National Congress draws nearer," ANZ Bank said in a note. FUNDAMENTALS * Thre