feature: JDBCAdapter doesn't implement the UpdatableAdapter interface

[hong6234]

What I do: Calling enforcer.updatePolicy(oldPolicyParams, newPolicyParams); to execute and save policy changes.

What to expect: Persist policy changes to the database.

What we get: Policy changes were not persisted to the database.

Requirement: It is hoped that JDBCAdapter will implement the UpdatableAdapter interface.

What is UpdatableAdapter?

• https://github.com/casbin/jcasbin/blob/536d194a72f2643fd4808177f1714f968daf2249/src/main/java/org/casbin/jcasbin/persist/UpdatableAdapter.java#L24

Golang's code: (as reference)

• https://github.com/search?q=org%3Acasbin+UpdatableAdapter++language%3AGo&type=code&l=Go

[casbin-bot]

@tangyang9464 @imp2002