dictionary/jpa : LEARNING : use UserTransaction through narayana-jta

[rxue]

testRollbackCreate() failed as expected since no standalone jta mechanism added yet

LEARNING : TypedQuery.getSingleResult() is designed to throw NoResultException if there is no result when it is used

[rxue]

commit above wa on base of

• https://docs.jboss.org/hibernate/orm/current/userguide/html_single/Hibernate_User_Guide.html#transactions-physical
• https://docs.jboss.org/hibernate/orm/current/userguide/html_single/Hibernate_User_Guide.html#transactions-physical-jtaplatform

But test failed unexpectedly: entity persisted into the database albeit the fact that UserTransaction.rollback() is called