Bug 424018 - Externalize strings

package
org.eclipse.emf.emfstore.internal.client.model.changeTracking.merging.conflict.conflicts;
Bug 449438 - EMFStoreCommandNotifier & OperationManager should use
ObserverBus
Bug 424018 - Externalize strings
Bug 449486 - Merge fuzzy and fuzzy.emf bundles
Bug 449438 - EMFStoreCommandNotifier & OperationManager should use
ObserverBus 

Adopted tests
Bug 449486 - Merge fuzzy and fuzzy.emf bundles

Small refactorings & javadoc