Fix stage-archive.sh to include common folder

Change-Id: I10c2dc003c329ba4493a48ee218f86b4cac7c449
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

devops-stages/stage-archive.sh

@@ -14,7 +14,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-PKG_DIRECTORIES="jenkins installers systest charms descriptor-packages tools docker robot-systest"
+PKG_DIRECTORIES="common jenkins installers systest charms descriptor-packages tools docker robot-systest"
 MDG_NAME=devops
 DEB_INSTALL=debian/osm-$MDG_NAME.install
 export DEBEMAIL="mmarchetti@sandvine.com"