From Bill Monroe’s “Walking In Jerusalem,” adapted from the Golden Gate Quartet, to Doyle Lawson & Quicksilver’s epic reworking of the Soul Stirrer’s “Jesus Gave Me Water,” bluegrass artists have drawn on the rich vein of African-American gospel singing. Now, The Gina Furtado Project serve up their own take on this tradition with “I Just Telephone Upstairs,” the group’s newest single for Mountain Home Music Company. Pared down …