message: fixed get schema
diff: @@ -71,8 +71,8 @@ AdHocSchemaManager::getTagSchema(GraphSpaceID space,
  // No schema
  return std::shared_ptr<const nebula::meta::NebulaSchemaProvider>();
  } else {
  - // the newest is is at first
  - return tagIt->second.front();
  + // the newest is the last one
  + return tagIt->second.back();
  }
  } else {
  // Looking for the specified version
  @@ -142,8 +142,8 @@ AdHocSchemaManager::getEdgeSchema(GraphSpaceID space,
  // No schema
  return std::shared_ptr<const nebula::meta::NebulaSchemaProvider>();
  } else {
  - // the newest is is at first
  - return edgeIt->second.front();
  + // the newest is the last one
  + return edgeIt->second.back();
  }
  } else {
  // Looking for the specified version
  