Fixing the NPE in the application toString operation.

components/application-mgt/org.wso2.carbon.device.application.mgt.common/src/main/java/org/wso2/carbon/device/application/mgt/common/Application.java

@@ -223,7 +223,11 @@ public class Application {
 
     @Override
     public String toString() {
-        return "UUID : " + uuid + "\tName : " + name + "\tShort Description : "
+        String app = "UUID : " + uuid + "\tName : " + name + "\tShort Description : "
-                + shortDescription + "\tLifecycle State : " + currentLifecycle.getLifecycleState();
+                + shortDescription;
+        if (currentLifecycle != null) {
+            app += "\tLifecycle State : " + currentLifecycle.getLifecycleState();
+        }
+        return app;
     }
 }