Prepare installers and Jenkins for Release FIFTEEN

Change-Id: I2b6f9d6743860e425915497314ab82a4e20c60e3
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index 35ced89..2364421 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -13,7 +13,7 @@
 #   limitations under the License.
 #
 REPOSITORY_BASE=https://osm-download.etsi.org/repository/osm/debian
-RELEASE=ReleaseFOURTEEN
+RELEASE=ReleaseFIFTEEN
 REPOSITORY=stable
 DOCKER_TAG="testing-daily"
 DEVOPS_PATH=/usr/share/osm-devops