Erika Wennerstrom breaks down in tears several songs into her support slot. Open House Festival Director Kieran Gilmore proclaims that “Bangor is the new Cathedral Quarter.” Jesca Hoop suggests that she and Sam Beam could be married by the end of the evening. Some context: on hiatus from fronting garage-rockers Heartless Bastards, Wennerstrom (below) is road-testing some emotionally direct solo material in Bangor tonight and it shows in her early nervous delivery. This is an intense and at times uncomfortable opening set, but she makes it through thanks to a hugely supportive audience. This is the Open House Festival’s fourth…