Fix log message

Author: trask

agent/src/main/java/com/microsoft/applicationinsights/agent/internal/config/builder/XmlParserUtils.java

@@ -113,7 +113,7 @@ public static Long getLong(Element element, String elementName) {
             }
             return null;
         } catch (Exception e) {
-            logger.error("Failed to parse attribute '{}' of '{}'", ENABLED_ATTRIBUTE, elementName);
+            logger.error("Failed to parse value of '{}'", elementName);
         }
         return null;
     }