Add Message To all assertEquals to know what method assertEquals its
call
Add adrian.example.musicplayer.model.Music.playlist.Playlist to
annotatedClasses in hibernate mapping
Add message to all method AssertEquals to know what method is user
Add message to all method assertEquals to knows what method is user
Add Entity adrian.example.musicplayer.model.Music.playlist.Playlist to
annotatedClasses in hibernate mapping
Add message to all method AssertEqual to knows what method is user
Add Entity adrian.example.musicplayer.model.Music.playlist.Playlist 
to annotatedClasses in hibernate mapping
remove unused imports

Add message to all method assertEquals to knows what method is used.
Add Entity adrian.example.musicplayer.model.Music.playlist.Playlist to
annotatedClasses in hibernate mapping
Change name variable WebApplicationContext wac  to applicationContext
first Commit
remove
Change location <security:authentication property="principal.username"
var="current_username" /> we need variable current_username in
<spring:url/>
change variable name WebApplicationContext 'wac' to applicationContext.
Add Entity adrian.example.musicplayer.model.Music.playlist.Playlist to
hibernate annotatedClasses mapping.
Add dataSource and hibernate configuration responsible for connect with
hsql database.

Also add bean 
userService location-
adrian.example.musicplayer.service.user.UserServiceImpl

userDaoImpl location-
adrian.example.musicplayer.dao.user.UserDaoImpl

bcryptEncoder location-
org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder

welcomeController  location-
adrian.example.musicplayer.web.Controller.Welcome.WelcomeController
Add database schema.