hardcode bootstrap period for superblock to avoid rounding issues
hardcode bootstrap period for superblock to avoid rounding issues


Former-commit-id: 19ee4991f954a6e96d1a8b38f954d5c2127c1e89
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin