Changing expiration timestamp to 10 seconds from now
Changing expiration timestamp to 10 seconds from now

Closes: #821

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