Fix/suppress PMD CompareObjectsWithEquals findings (#11476)

Newer PMD versions discover more CompareObjectsWithEquals findings.

Related to https://github.com/openhab/static-code-analysis/pull/423

Signed-off-by: Wouter Born <github@maindrain.net>

bundles/org.openhab.binding.mqtt.homie/src/main/java/org/openhab/binding/mqtt/homie/internal/homie300/Property.java

@@ -177,7 +177,7 @@ public class Property implements AttributeChanged {
         Value value;
         Boolean isDecimal = null;
 
-        if (attributes.name == "") {
+        if (attributes.name.isEmpty()) {
             attributes.name = propertyID;
         }