HHH-8010 Support app-managed EntityManagerFactory and SessionFactory
creation by OSGi bundles

Conflicts:
	hibernate-core/src/main/java/org/hibernate/boot/registry/classloading/internal/ClassLoaderServiceImpl.java
	hibernate-core/src/main/java/org/hibernate/cfg/Configuration.java
	hibernate-core/src/main/java/org/hibernate/engine/jdbc/connections/internal/DriverManagerConnectionProviderImpl.java
	hibernate-entitymanager/src/main/java/org/hibernate/ejb/Ejb3Configuration.java
	hibernate-osgi/src/main/java/org/hibernate/osgi/HibernateBundleActivator.java
HHH-8010 Moved OsgiClassLoader handling into
BootstrapServiceRegistryBuilder