Ladder tarena made global (#5227)
Ladder tarena made global (#5227)

* modify ladder view initialization for tarena hackthon classroom
javatlacati/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,codecombat/codecombat,jeremiahyan/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,codecombat/codecombat,jeremiahyan/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,javatlacati/codecombat,codecombat/codecombat