Prepare installer files, Jenkins and workflow templates for Release NINETEEN

Change-Id: I3799f2d672ecbfa8cb1de483c2b5962575a9133b
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index e654d6b..28d36f3 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -13,8 +13,8 @@
 #   limitations under the License.
 #
 
-DEVOPS_GERRIT_REFSPEC="master"
-DOCKER_TAG="testing-daily"
+DEVOPS_GERRIT_REFSPEC="v19.0"
+DOCKER_TAG="19"
 
 function usage(){
     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function