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


Former-commit-id: 88d2ea9feb0bfdf89d0cab2fca461e137743595d
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin