more fixes related to Metadata MR !6

simpleexample2/core/src/main/java/simpleex/core/MetaData.java

@@ -292,12 +292,7 @@ public class MetaData {
    * @return true if custom false if standard prop
    */
   public boolean  isCustomProperty(String propertyName) {
-    for (String knownPropertyName : STD_PROPERTIES) { 
-      if (propertyName == knownPropertyName) { 
-        return false; 
-      }
-    } 
-    return true; 
+    return !(STD_PROPERTIES.contains(propertyName));
   }
   
   /**
@@ -322,7 +317,7 @@ public class MetaData {
     outer: for (int i = 0; i < this.properties.size(); i = i + 2) { 
       String propertyName = this.properties.get(i); 
       for (String knownPropertyName : propertyNames) { 
-        if (propertyName == knownPropertyName) { 
+        if (propertyName.equals(knownPropertyName)) { 
           continue outer; 
         } 
         return true;