Don't tie app to a specific version

Change-Id: Id35d8fd6ca9e79e3e2ec5c75db9677278580d1c7
(cherry picked from commit e872eee8c9fd5cd0acf2e9ef75268e1897ff8ea4)
diff --git a/containers/cord-apps/Dockerfile.vtn b/containers/cord-apps/Dockerfile.vtn
index 2091da6..6132284 100644
--- a/containers/cord-apps/Dockerfile.vtn
+++ b/containers/cord-apps/Dockerfile.vtn
@@ -5,4 +5,4 @@
 RUN     git clone https://gerrit.opencord.org/p/vtn.git && cd vtn && \
         mvn clean install
 
-CMD bash -c "source /root/.bashrc; onos-app onos-cord-1 install /src/vtn/target/vtn-1.0-SNAPSHOT.oar && onos-app onos-cord-1 activate org.opencord.vtn"
+CMD bash -c "source /root/.bashrc; onos-app onos-cord-1 install /src/vtn/target/vtn-*.oar && onos-app onos-cord-1 activate org.opencord.vtn"