Prepare installer files, Jenkins and workflow templates for Release EIGHTEEN

Change-Id: Idb95cf6b4b076feea34e12b1b190884edcd9d8b6
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index 870de5c..7e274a6 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -13,9 +13,9 @@
 #   limitations under the License.
 #
 REPOSITORY_BASE=https://osm-download.etsi.org/repository/osm/debian
-RELEASE=ReleaseSIXTEEN
+RELEASE=ReleaseEIGHTEEN
 REPOSITORY=stable
-DOCKER_TAG="testing-daily"
+DOCKER_TAG="18"
 DEVOPS_PATH=/usr/share/osm-devops
 
 function usage(){