fix(prometheus - lcm): prometheus was using the wron directory because at install lcm changes the hostPath with sed, now prometheus is also included in that change

Change-Id: Ie4bf316c69ac2b344de72b485dfb378849c060e0
Signed-off-by: bravof <fbravo@whitestack.com>
diff --git a/installers/full_install_osm.sh b/installers/full_install_osm.sh
index bb0f574..ec44acf 100755
--- a/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@ -873,7 +873,7 @@
 }
 
 function namespace_vol() {
-    osm_services="nbi lcm ro pol mon kafka mongo mysql"
+    osm_services="nbi lcm ro pol mon kafka mongo mysql prometheus"
     for osm in $osm_services; do
         $WORKDIR_SUDO  sed -i "s#path: /var/lib/osm#path: $OSM_NAMESPACE_VOL#g" $OSM_K8S_WORK_DIR/$osm.yaml
     done