[move-unit-test] bring back the verbose mode
[move-unit-test] bring back the verbose mode

which is accidentally deleted during the refactoring

aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,libra/libra,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core