Added serialversionID.

src/main/java/se/su/dsv/scipro/reusable/AbstractRoleAutoCompleteComponent.java

@@ -19,7 +19,9 @@ public abstract class AbstractRoleAutoCompleteComponent<T extends Role> extends
 	@Override
 	protected Renderer<T> getListItemRenderer() {
 		return new Renderer<T>() {
-			@Override
+            private static final long serialVersionUID = -7256889096575950095L;
+
+            @Override
 			protected String getHeader(T item) {
 				return item.getNameAsString();
 			}