by Sharon Hazard for The Wild Geese When George Millar of the Irish Rovers talks about the music his group has been playing for more than 40 years, he can’t help mentioning the bodhrán, the traditional drum.   Millar, one of the original members of band, knows the value of the driving rhythm the bodhrán adds to the drama of a song. For the group’s The Pride of Belfast album, Millar wrote a song t…