Alan Gaffney sets sights on top-four finish by revitalising Northampton

• Australian keen to instil confidence before Gloucester’s visit on Saturday• Dylan Hartley to remain captain despite criticism after Twickenham defeatAlan Gaffney believes he can guide Northampton to a top-four finish in the Premiership despite the club’s run of 11 successive defeats in major competitions, after taking over until the end of the season.Saints, who sacked Jim Mallinder after a decade as director of rugby last month, are 10th in the Premiership after seven consecutive league defeats, with Worcester only three points below them. They are now closer in terms of points to the botto…