Add some unit integration tests for the word search feature.
Fix TenantTest

- Remove test that should not have been committed
- Fix unit test
Add a warning when the word based search feature is enabled (for potential performance impacts)
Rename services/bonita-persistence/bonita-persistence-hibernate/src/test/java/org/bonitasoft/engine/persistence/MySuperTestIT.java -> services/bonita-persistence/bonita-persistence-hibernate/src/test/java/org/bonitasoft/engine/persistence/HibernatePersistenceIT.java
Add first unit test on isWordSearchEnabled.
Refactor test for the isWordSearchEnabled
Add exclusions tests for the isWordSearchEnabled method.
Add some unit tests with inheritency for the isWordSearchEnabled.