Once-secretive Santeria faith brings its healing message into the open Reina Sanchez slowly steps into the second-floor of the white triple-decker Dorchester home, removes her shoes, and greets the man dressed in white, from head to toe. “Happy Birthday padrino,” she tells Steve Quintana, fondly calling him godfather in her native Spanish. Like his house, Quintana is a picture of white, from his cotton pants and undershirt to his cap, as are some of his followers. “Kneel right there my dear,” Quintana says, pointing to the wooden floor in front of the shrine. Before she plants herself on the floor,