proxy to existing method

Co-authored-by: Jack Smith <72623970+jasmith-hs@users.noreply.github.com>

Author: ccutrer

src/main/java/com/hubspot/jinjava/objects/collections/PyMap.java

@@ -22,10 +22,7 @@ protected Map<String, Object> delegate() {
   }
 
   public Object get(String key, Object defaultValue) {
-    if (!map.containsKey(key)) {
-      return defaultValue;
-    }
-    return map.get(key);
+    return getOrDefault(key, defaultValue);
   }
 
   @Override