Fix empty node deserialization.

Add enabled to backup service.

Author: Aaron

build.gradle

@@ -4,7 +4,7 @@ subprojects {
     apply plugin: 'maven'
 
     group 'org.iot-dsa'
-    version '0.32.8'
+    version '0.33.0'
 
     sourceCompatibility = 1.6
     targetCompatibility = 1.6