Installer and pipelines updates for Rel NINE

Change-Id: I86786dc85eda0f717dac75049f7136bc668449d7
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/docker/POL/Dockerfile b/docker/POL/Dockerfile
index 43a271e..879e91c 100644
--- a/docker/POL/Dockerfile
+++ b/docker/POL/Dockerfile
@@ -30,7 +30,7 @@
  && pip3 install pip==9.0.3
 
 ARG REPOSITORY_BASE=http://osm-download.etsi.org/repository/osm/debian
-ARG RELEASE=ReleaseEIGHT-daily
+ARG RELEASE=ReleaseNINE-daily
 ARG REPOSITORY_KEY=OSM%20ETSI%20Release%20Key.gpg
 ARG REPOSITORY=testing