Split package removal

[vietj]

The package vertx-auth-common contains a few types in the io.vertx.ext.auth package which creates a split package situation, preventing the vertx-auth project to support JPMS.

This changes the packages of those classes, allowing an eventual JPMS support.

The refactored types are:

• io.vertx.ext.auth.HashingStrategy → io.vertx.ext.auth.hashing.HashinStrategy
• io.vertx.ext.auth.HashingAlgorithm → io.vertx.ext.auth.hashing.HashingAlgorithm
• io.vertx.ext.auth.ChainAuth → io.vertx.ext.auth.chain.ChainAuth
• io.vertx.ext.auth.JWTOptions → io.vertx.ext.auth.jose.JWTOptions
• io.vertx.ext.auth.KeyStoreOptions → io.vertx.ext.auth.jose.KeyStoreOptions
• io.vertx.ext.auth.NoSuchKeyIdException → io.vertx.ext.auth.jose.NoSuchKeyIdException
• io.vertx.ext.auth.PubSecKeyOptions → io.vertx.ext.auth.jose.PubSecKeyOptions
• io.vertx.ext.auth.PRNG → io.vertx.ext.auth.prng.PRNG
• io.vertx.ext.auth.VertxContextPRNG → io.vertx.ext.auth.prng.VertxContextPRNG
• io.vertx.ext.auth.User→ io.vertx.ext.auth.user.User