fix postgres-exporter role
fix postgres-exporter role

samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur,samuelclay/NewsBlur