Add the olive oil to the pot, and bring to medium-high heat. When the oil is hot, add the vegetables. Cook, stirring occasionally, until the onion and celery are caramelized on the edges, about 5 minutes. Put the chicken back in the pot , and pour in the white wine. Drop in the rosemary. Boil until the wine is reduced by half, then add the chopped porcini and the soaking liquid, omitting any gritty residue in the soaking liquid. Once the liquid, returns to a boil, add the tomatoes. Rinse out the can with 1 cup hot water and pour it into the sauce also. Bring to a boil, and simmer to let the sauce come together, about 5 minutes.