Failed to use Neutron northbound interface.

I failed to use Neutron northbound interface when I installed "odl-adsal-compatibility" before installed "odl-adsal-northbound".
For example, GET requests for neutron/networks returned the response code 500 (Internal Server Error) and an error message, although it should return the response code 200 and network information.

curl --user "admin":"admin" -H "Accept: application/json" -H \
"Content-type: application/json" -X GET \
http://localhost:8080/controller/nb/v2/neutron/networks

I observed this issue on both Helium and Helium SU1.

When I sent a GET request to Neutron interface, Helium output the following ERROR message into karaf.log.

ERROR | -bio-8080-exec-1 | [/controller/nb/v2/neutron] | 309 - org.apache.juli.extras - 7.0.53.v201406060720 | StandardWrapper.Throwable
java.lang.NoClassDefFoundError: org/eclipse/persistence/jaxb/rs/MOXyJsonProvider

How to reproduce the issue
==========================

1. Run Karaf.

$ bin/karaf

2. Install VTN features.

feature:install odl-adsal-compatibility
feature:install odl-adsal-northbound

3. Send a GET request to Neutron interface.
curl --user "admin":"admin" -H "Accept: application/json" -H \
"Content-type: application/json" -X GET \
http://localhost:8080/controller/nb/v2/neutron/networks

The expected response message of the GET request is as follows:

The odd thing is that if I install just "odl-adsal-northbound", I successfully access the Neutron northbound interface.