SAN JOSE — After a decade of playoff disappointments, it seemed like the Sharks had finally found the missing ingredient with a slick trade in the summer of 2015.Martin Jones opened his career with the Sharks by setting a franchise-record shutout streak of 234:33 during his first week on the job. Later, in the spring, he led the Sharks to their first appearance in the Stanley Cup Final, recording a .923 save percentage in 24 games. The future looked bright. At 26, Jones had the potential to …