add VPLS API jar file to published artifacts
add VPLS API jar file to published artifacts

Change-Id: I88e8a3aa724734827e3f271112d3b93112c935b9

gkatsikas/onos,opennetworkinglab/onos,opennetworkinglab/onos,gkatsikas/onos,oplinkoms/onos,opennetworkinglab/onos,opennetworkinglab/onos,gkatsikas/onos,opennetworkinglab/onos,oplinkoms/onos,oplinkoms/onos,opennetworkinglab/onos,oplinkoms/onos,oplinkoms/onos,gkatsikas/onos,oplinkoms/onos,gkatsikas/onos,oplinkoms/onos,gkatsikas/onos