(Corrects sport in ninth para to rugby sevens) By Karolos Grohmann ST PETERSBURG, May 29 (Reuters) - Hockey and rugby will play their Rio de Janeiro 2016 Olympics competitions at the more remote Deodoro area of the city after organisers boosted the number of sports there to liven up what they say has now become a second Olympic park. With hockey, initially set to be at the main Olympic park by the sea, forced to move to the Deodoro cluster, organisers said they were also placing Olympic debutants rugby sevens there, as well as some basketball preliminaries. ... More...