Canvassing for support, getting heckled, hanging out in bars " it's all great practice for politicians. And Alex Salmond is leading the way' Joanna Griffin and Lola Stephenson are a comedy double actParliament rises for recess tomorrow and the MPs will swap the daily commute to Westminster for breakfast in bed " whether to opt for soft or hard boiled eggs, their only pressing concern. They can stop worrying about lea…