test: Add missing sync_blocks to feature_pruning
test: Add missing sync_blocks to feature_pruning

Former-commit-id: 8dfbf3ab4f32f3c5bde10a330e93838a1b2a742f
syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin