title: How to delete an entity after creating it using jhipster?
body: <p>I have created 3 entities (Author, Book, Library) using "yo jhipster:entity" command but in one entity (Library) I had a ManyToMany relationship (to Book) but that caused "mappedBy reference an unknown target entity property: com.tst.testdomain.domain.Book.librarys in com.tst.testdomain.docmain.Library.books" so what is the clean way of deleted the Library entity. Would a command like "yo jhipster:entitydelete" be useful?</p>