Partially revert 1922 (#2108)
Partially revert 1922 (#2108)

Turned out we actually need mixing collaterals charged as fees in our mempool for them to be relayed.

Former-commit-id: 66e01f4b91d776bb48126af149f22423bca21d93
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin