Precompiles are not derived from DataWord

[fedejinich]

This should be a minor issue, but HD_WALLET_UTILS_ADDR & BLOCK_HEADER_ADDR precompiles are being derived from raw String address instead of being derived from DataWord (like all the other precompiles).

It should be an easy-to-go issue without affecting any functionality nor-consensus rule.

rskj/rskj-core/src/main/java/org/ethereum/vm/PrecompiledContracts.java

Line 106 in 7169151

public static final RskAddress HD_WALLET_UTILS_ADDR = new RskAddress(HD_WALLET_UTILS_ADDR_STR);

rskj/rskj-core/src/main/java/org/ethereum/vm/PrecompiledContracts.java

Line 107 in 7169151

public static final RskAddress BLOCK_HEADER_ADDR = new RskAddress(BLOCK_HEADER_ADDR_STR);

Also, I've done a quick check by doing the change and re-running the tests, and everything was ok (as expected).