[DSL generator] Avoid injecting the state pattern in label if already present in stateDescription metadata (openhab#4730)

Signed-off-by: Laurent Garnier <lg.hc@free.fr>

Author: lolodomo

bundles/org.openhab.core.model.item/src/org/openhab/core/model/item/internal/fileconverter/DslItemFileConverter.java

@@ -185,6 +185,10 @@ private ModelItem buildModelItem(Item item, List<Metadata> channelLinks, List<Me
             if (!(statePattern != null && binding.getProperties().size() == 1
                     && (patternInjected || statePattern.equals(defaultPattern)))) {
                 model.getBindings().add(binding);
+                // Avoid injecting the state pattern in label if already present in stateDescription metadata
+                if (patternInjected && statePattern != null) {
+                    model.setLabel(label);
+                }
             }
         }