Parse hidserv*seen_value and hidserv*cells_value as long

We parse seen onion services and relayed cells as double:

    try {
      this.hidservDirOnionsSeen = Double.parseDouble(partsNoOpt[1]);
    } catch (NumberFormatException e) {
      throw new DescriptorParseException("Illegal line '" + line + "'.");
    }

and

try {
      this.hidservRendRelayedCells = Double.parseDouble(partsNoOpt[1]);
    } catch (NumberFormatException e) {
      throw new DescriptorParseException("Illegal line '" + line + "'.");
    }

However, they should actually be integers as the spec says (emphasis mine):

third, the result of the previous obfuscation steps is truncated to the next smaller *integer* and included as 'NUM'