openflowPlugin still uses for IT unsupported version of nagasena

Updated the openflowplugin IT to use the newer version of the nagasena
artifacts that not longer comes from controller. Without this patch
this project cannot release artifacts because will depends on a
SNAPSHOT that cannot be made RELEASED

(cherry picked from commit cd423528eb915dea53b584db2b56b727415b2691)

Change-Id: Id9d2847860480db91b0d1604d7071a64f25970c3
Signed-off-by: Giovanni Meo <gmeo@cisco.com>
Signed-off-by: Michal Rehak <mirehak@cisco.com>