Fix default installer to make local cluster pull images from docker proxy

This change also reverts previous commit bc5422cf9fd9d21d7028d445fe1982080101611a.

Change-Id: Ia72ce8677a8ebe15f15e6f79d8b158654393f93a
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/full_install_osm.sh b/installers/full_install_osm.sh
index 3ca7db7..03439a1 100755
--- a/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@ -216,22 +216,10 @@
     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 }
 
-function create_k8s_secret_regcred() {
-    [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
-    echo "Creating K8s secret regcred with the docker registry credentials from $HOME/.docker/config.json"
-    kubectl -n osm create secret generic regcred \
-        --from-file=.dockerconfigjson=$HOME/.docker/config.json \
-        --type=kubernetes.io/dockerconfigjson
-    [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
-}
-
 function pull_docker_images() {
     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
     echo "Pulling docker images"
-    if [ -n "${DOCKER_REGISTRY_URL}" ]; then
-        docker_login
-        create_k8s_secret_registrycreds
-    fi
+    [ -n "${DOCKER_REGISTRY_URL}" ] && docker_login
 
     echo "Pulling non-OSM docker images"
     if [ -z "$TO_REBUILD" ] || echo $TO_REBUILD | grep -q KAFKA ; then