listIterator() not implemented in melange.adapters.EListAdapter

[dvojtise]

When loading a model with adapter using Sirius in GEMOC, it proceeds with a classic org.eclipse.emf.ecore.util.EcoreUtil.resolveAll, this call fails because the method listIterator() in fr.inria.diverse.melange.adapters.EListAdapter is not implemented. (https://github.com/diverse-project/melange/blob/master/plugins/fr.inria.diverse.melange.adapters/src/main/java/fr/inria/diverse/melange/adapters/EListAdapter.xtend#L91)

This issue seems blocking for using Melange adapters in GEMOC (see eclipse/gemoc-studio-modeldebugging#27)

java.lang.UnsupportedOperationException
	at fr.inria.diverse.melange.adapters.EListAdapter.listIterator(EListAdapter.java:138)
	at org.eclipse.emf.ecore.util.EContentsEList$FeatureIteratorImpl.hasNext(EContentsEList.java:463)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolveCrossReferences(EcoreUtil.java:306)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolveAll(EcoreUtil.java:300)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolveAll(EcoreUtil.java:285)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolveAll(EcoreUtil.java:273)
	at org.eclipse.gemoc.executionframework.extensions.sirius.modelloader.DefaultModelLoader.loadModelThenConfigureResourceSet(DefaultModelLoader.java:381)
	at org.eclipse.gemoc.executionframework.extensions.sirius.modelloader.DefaultModelLoader.openNewSiriusSession(DefaultModelLoader.java:234)
	at org.eclipse.gemoc.executionframework.extensions.sirius.modelloader.DefaultModelLoader.loadModel(DefaultModelLoader.java:167)
	at org.eclipse.gemoc.executionframework.extensions.sirius.modelloader.DefaultModelLoader.loadModelForAnimation(DefaultModelLoader.java:128)
	at org.eclipse.gemoc.executionframework.engine.commons.ModelExecutionContext.initializeResourceModel(ModelExecutionContext.java:71)
	at org.eclipse.gemoc.execution.sequential.javaengine.ui.launcher.Launcher.createExecutionEngine(Launcher.java:64)
	at org.eclipse.gemoc.executionframework.engine.ui.launcher.AbstractSequentialGemocLauncher.launch(AbstractSequentialGemocLauncher.java:106)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:885)
	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:739)
	at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1039)
	at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1256)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)