install_osm: fix RELEASE, REPOSITORY and DOCKER_TAG vars

Change-Id: I97893b264568f32e9ada5e6a7674c1bda7631b70
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index 2481cd5..01d96e9 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=ReleaseSEVEN-daily
-REPOSITORY=testing
-DOCKER_TAG=releaseseven
+RELEASE=ReleaseSEVEN
+REPOSITORY=stable
+DOCKER_TAG=7
 
 function usage(){
     echo -e "usage: $0 [OPTIONS]"