add missing initialize_blockchain() call for initchain tool.
add missing initialize_blockchain() call for initchain tool.

bitprim/bitprim-blockchain-replier,libmetrocoin/libmetrocoin-blockchain,bitprim/bitprim-blockchain-replier,libmetrocoin/libmetrocoin-blockchain,libtetcoin/libtetcoin-blockchain,libtetcoin/libtetcoin-blockchain,libmetrocoin/libmetrocoin-blockchain,libtetcoin/libtetcoin-blockchain