Fix Multidirectory configuration

2018-09-19 11:27:25,756 ERROR [localhost-startStop-1] [org.nuxeo.runtime.model.impl.RegistrationInfoImpl] Component service:org.nuxeo.ecm.directory.DirectoryServiceImpl notification of application started failed: Cannot be instantiated as Directory: org.nuxeo.ecm.directory.BaseDirectoryDescriptor
java.lang.UnsupportedOperationException: Cannot be instantiated as Directory: org.nuxeo.ecm.directory.BaseDirectoryDescriptor
	at org.nuxeo.ecm.directory.BaseDirectoryDescriptor.newDirectory(BaseDirectoryDescriptor.java:364)
	at org.nuxeo.ecm.directory.DirectoryRegistry.getDirectory(DirectoryRegistry.java:177)
	at org.nuxeo.ecm.directory.DirectoryRegistry.getDirectories(DirectoryRegistry.java:211)
	at org.nuxeo.ecm.directory.DirectoryServiceImpl.getDirectories(DirectoryServiceImpl.java:174)
	at org.nuxeo.ecm.directory.DirectoryServiceImpl.start(DirectoryServiceImpl.java:83)
	at org.nuxeo.runtime.model.impl.RegistrationInfoImpl.start(RegistrationInfoImpl.java:382)
	at org.nuxeo.runtime.model.impl.ComponentManagerImpl.startComponent(ComponentManagerImpl.java:710)
	at org.nuxeo.runtime.model.impl.ComponentManagerImpl.startComponents(ComponentManagerImpl.java:690)
	at org.nuxeo.runtime.model.impl.ComponentManagerImpl.start(ComponentManagerImpl.java:793)
	at org.nuxeo.runtime.osgi.OSGiRuntimeService.startComponents(OSGiRuntimeService.java:460)
	at org.nuxeo.runtime.osgi.OSGiRuntimeService.frameworkEvent(OSGiRuntimeService.java:475)
	at org.nuxeo.osgi.OSGiAdapter.fireFrameworkEvent(OSGiAdapter.java:223)
	at org.nuxeo.osgi.application.loader.FrameworkLoader.doStart(FrameworkLoader.java:226)
	at org.nuxeo.osgi.application.loader.FrameworkLoader.start(FrameworkLoader.java:125)
	at org.nuxeo.runtime.deployment.NuxeoStarter.start(NuxeoStarter.java:124)
	at org.nuxeo.runtime.deployment.NuxeoStarter.contextInitialized(NuxeoStarter.java:93)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4745)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5207)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:630)
	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1842)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
2018-09-19 11:27:32,670 ERROR [localhost-startStop-1] [org.nuxeo.runtime.osgi.OSGiRuntimeService] Nuxeo Platform Started
======================================================================
= Component Loading Status: Pending: 0 / Missing: 0 / Unstarted: 1 / Total: 542
  - service:org.nuxeo.ecm.directory.DirectoryServiceImpl