Phyllis Montana LeBlanc probably would have chosen a different career path, but the devastation that was Hurricane Katrina helped her find a new life. After the New Orleans resident was featured in the Emmy-winning Spike Lee documentary “When the Levees Broke,” Lee recommended her for a new dramatic TV series shooting in New Orleans in the aftermath of Katrina. That show is “Treme,” now in its third season on HBO. Sadly, though the subject matter of fictional Katrina survivors and how they fared was compelling, “Treme” has been hampered by lackluster ratings. HBO announced that they will conclude the show after a shortened fourth season next year.