Only include current version's pom and feature.xml files in the package

Change-Id: I3014497b2af6e0a992aef4a8ff8494f80559d452

@@ -49,7 +49,7 @@ function build_stage_dir() {
     # Stage the ONOS bundles, but only those that match the version
     mkdir -p $ONOS_STAGE/$KARAF_DIST/system/org/onosproject
     find $M2_REPO/org/onosproject -type f -path "*/$ONOS_POM_VERSION/*" \
-        -name '*.jar' -o -name '*.pom' -o -name '*-features.xml' \
+        \( -name '*.jar' -o -name '*.pom' -o -name '*-features.xml' \) \
             | grep -v -Ee '-tests.jar|-[0-9]{8}.[0-9]{6}-' \
             | while read src; do
         dst=$ONOS_STAGE/$KARAF_DIST/system/${src#$M2_REPO/*}