modify create player services to use POST body as JSON
modify create player services to use POST body as JSON

ARISGames/server,tl-its-umich-edu/ARISGames-server,ARISGames/server,ARISGames/server,tl-its-umich-edu/ARISGames-server,ARISGames/server,tl-its-umich-edu/ARISGames-server,tl-its-umich-edu/ARISGames-server