Update installer shell scripts to set env vars after getopts

Change-Id: I656df0d03d986928768d0f108719cf16002c8f40
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_ngsa.sh b/installers/install_ngsa.sh
index 347ab48..6931432 100755
--- a/installers/install_ngsa.sh
+++ b/installers/install_ngsa.sh
@@ -39,15 +39,6 @@
 }
 
 # main
-
-DOCKER_REGISTRY_URL=
-DOCKER_USER="opensourcemano"
-OSM_DEVOPS="/usr/share/osm-devops"
-OSM_DOCKER_TAG="testing-daily"
-OSM_HELM_WORK_DIR="/etc/osm/helm"
-OSM_NAMESPACE="osm"
-DEFAULT_IP="127.0.0.1"
-
 while getopts ":D:d:i:s:t:r:U:-: " o; do
     case "${o}" in
         i)
@@ -90,15 +81,25 @@
     esac
 done
 
-source $OSM_DEVOPS/common/logging
-source $OSM_DEVOPS/common/track
-
-echo "DEFAULT_IP=$DEFAULT_IP"
+DEBUG_INSTALL=${DEBUG_INSTALL:-}
+DEFAULT_IP=${DEFAULT_IP:-"127.0.0.1"}
+OSM_DEVOPS=${OSM_DEVOPS:-"/usr/share/osm-devops"}
+OSM_DOCKER_TAG=${OSM_DOCKER_TAG:-"testing-daily"}
+OSM_HELM_WORK_DIR=${OSM_HELM_WORK_DIR:-"/etc/osm/helm"}
+OSM_NAMESPACE=${OSM_NAMESPACE:-"osm"}
+DOCKER_REGISTRY_URL=${DOCKER_REGISTRY_URL:-}
+DOCKER_USER=${DOCKER_USER:-"opensourcemano"}
 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
+echo "DEFAULT_IP=$DEFAULT_IP"
 echo "OSM_DEVOPS=$OSM_DEVOPS"
 echo "OSM_DOCKER_TAG=$OSM_DOCKER_TAG"
 echo "OSM_HELM_WORK_DIR=$OSM_HELM_WORK_DIR"
 echo "OSM_NAMESPACE=$OSM_NAMESPACE"
+echo "DOCKER_REGISTRY_URL=$DOCKER_REGISTRY_URL"
+echo "DOCKER_USER=$DOCKER_USER"
+
+source $OSM_DEVOPS/common/logging
+source $OSM_DEVOPS/common/track
 
 install_airflow
 track deploy_osm airflow_ok