By Matt Hladik Pittsburgh Steelers fans can breathe a sigh of relief. Diontae Johnson is back with the team after skipping the beginning of OTAs. Johnson’s previous absence had some fans worried that he might be planning a holdout. A report emerged linking his lack of attendance to a push for a new contract, but Johnson denied it. Whatever the reason was, it seems moot at this point now that Johnson is practicing with his teammates. Not surprisingly, Pittsburgh fans are pumped up. Johnson has been a key contributor for each of his first three seasons, increasing his production every year. In 2…