By Matt Hardy The four clubs set to contest this weekend’s Investec Champions Cup and European Challenge Cup had mixed fortunes in their domestic leagues at the weekend as each side prepares for the showpiece finale at Tottenham Hotspur Stadium on Friday and Saturday night. The English team Gloucester will face South African franchise the Sharks on Friday night in the Challenge Cup before Irish giants Leinster and five-time winners Toulouse face off in the Champions Cup final on Saturday. Challenge CupGloucester concluded their Premiership season with a 54-14 victory over Newcastle Falcons on …