Fix silent exception when adding a tag to a doc type not supporting tagging

17:03:26,958 WARN  [ReconnectedEventBundleImpl] Listener 'notificationListener' cannot refetch missing document: 11cefb22-6991-4dc5-8f54-eb19c9dd8937 (/default-domain/Nuxeo_Workspace/Test_Folder)
java.lang.reflect.InvocationTargetException
	at sun.reflect.GeneratedMethodAccessor1258.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.nuxeo.ecm.automation.core.impl.InvokableMethod.doInvoke(InvokableMethod.java:173)
	at org.nuxeo.ecm.automation.core.impl.InvokableMethod.invoke(InvokableMethod.java:178)
	at org.nuxeo.ecm.automation.core.impl.OperationChainCompiler$OperationMethod.invoke(OperationChainCompiler.java:128)
	at org.nuxeo.ecm.automation.core.impl.OperationChainCompiler$CompiledChainImpl.invoke(OperationChainCompiler.java:196)
	at org.nuxeo.ecm.automation.core.impl.OperationServiceImpl.run(OperationServiceImpl.java:120)
	at org.nuxeo.ecm.automation.core.impl.OperationServiceImpl.run(OperationServiceImpl.java:107)
	at org.nuxeo.ecm.automation.server.jaxrs.OperationResource.execute(OperationResource.java:58)
	at org.nuxeo.ecm.automation.server.jaxrs.ExecutableResource.doPost(ExecutableResource.java:70)
	...
Caused by: java.lang.UnsupportedOperationException
	at java.util.AbstractList.add(AbstractList.java:148)
	at java.util.AbstractList.add(AbstractList.java:108)
	at org.nuxeo.ecm.platform.tag.FacetedTagService.doTag(FacetedTagService.java:77)
	at org.nuxeo.ecm.platform.tag.AbstractTagService.lambda$tag$0(AbstractTagService.java:103)
	at org.nuxeo.ecm.core.api.CoreInstance$4.run(CoreInstance.java:327)
	at org.nuxeo.ecm.core.api.UnrestrictedSessionRunner.runUnrestricted(UnrestrictedSessionRunner.java:117)
	at org.nuxeo.ecm.core.api.CoreInstance.doPrivileged(CoreInstance.java:329)
	at org.nuxeo.ecm.platform.tag.AbstractTagService.tag(AbstractTagService.java:102)
	at org.nuxeo.ecm.platform.tag.operations.TagDocument.run(TagDocument.java:58)
	... 139 more