Usermanagement. User, Roles, Fixtures.
ZEF-1 add the h2 database to the test classpath
ZEF-1 Add a database configuration for integrationtests. Add a profile that is only to be used in integration tests
ZEF-1 Add a rolerepository, default test and RoleEnum
ZEF-1 Added a UserRepository and IntegrationTest for the UserRepository
ZEF-1 Create a RepositoryIntegrationTest
ZEF-1 Start working on the RegistrationService
ZEF-1 Created test for the UserDetailsServiceImpl