If Andrea Stramaccioni was still in need of a reminder that Inter have a reputation as a club for whom craziness is nothing out of the ordinary then seeing Mario Balotelli gatecrash his first press conference as their new manager on Tuesday afternoon left him under no further illusion.   On returning to his seat after shaking the former Inter striker’s hand, he expressed surprise, made a little joke and gave a shrug. Stramaccioni was unfazed. He has done his best throughout his life to be prepared for anything.   Reflecting on his sudden promotion from his position as coach of Inter’s principal youth team, the Primavera, Stramaccioni struck the right balance between having confidence in his own abilities and conveying humility at receiving…