INDEPENDENCE, Ohio (AP) — When John Beilein resigned as Cleveland’s coach, swallowing his pride to leave the Cavaliers after just 54 games, he offered his preordained replacement some encouraging words. “Go after it,” J.B. Bickerstaff said, repeating Beilein’s final message. That’s Bickerstaff’s plan. It’s now up to the 40-year-old, who has experience at picking up the pieces after previously…