8134426: Add serialVersionUID field to relevant javax.transaction classes
Reviewed-by: joehw, alanb

8040147: minor cleanup for docs
Summary: minor cleanup for docs
Reviewed-by: lancea

8077991: Missing javadoc in exceptions types in javax.transaction
Reviewed-by: rriggs, lancea, alanb

8047776: Add module java.transaction to export API javax.transaction
Reviewed-by: lancea, mchung