fixing the agent unable to enroll issue

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java

@@ -335,7 +335,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             }
             return false;
         }
-        try {
+
         int tenantId = this.getTenantId();
 
         Device device = this.getDevice(deviceId, false);
@@ -350,8 +350,10 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             if (log.isDebugEnabled()) {
                 log.debug("Device has already disenrolled : " + deviceId.getId() + "'");
             }
-                return false;
+            return true;
         }
+
+        try {
             device.getEnrolmentInfo().setDateOfLastUpdate(new Date().getTime());
             device.getEnrolmentInfo().setStatus(EnrolmentInfo.Status.REMOVED);
             DeviceManagementDAOFactory.beginTransaction();