Unable to load class 'org.hibernate.proxy.HibernateProxy' in Fuse logs

Issue

• We are trying to deploy an application which uses persistence, but we get the following error:

Unable to load class 'org.hibernate.proxy.HibernateProxy' because the bundle wiring for com.bundle-mysql-dao is no longer valid.

• The application has two bundles: the bundle A contains the service and persistence.xml, the bundle B contains the entity classes.

• We need to package the @Entity classes in a separate bundle in order to share these classes among various services:
  our application must support multiple databases, so we need to share @Entity classes among services that have Entity Managers bound to various datasources.