Refactor free campaign ID, parallel to CodeCombat
Refactor free campaign ID, parallel to CodeCombat

codecombat/codecombat,javatlacati/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat