Update deployment of OSM to use input OSM_BASE_DOMAIN, otherwise set it from nginx IP address

Change-Id: I4a6191777e021924013f969f009623634b3d6aab
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/00-default-install-options.rc b/installers/00-default-install-options.rc
index ea39c3a..345d8b2 100644
--- a/installers/00-default-install-options.rc
+++ b/installers/00-default-install-options.rc
@@ -46,7 +46,7 @@
 export OSM_BEHIND_PROXY=
 export OPENSHIFT_MGMT_CLUSTER=
 export MGMT_CLUSTER_CA_FILE=
-export OSM_K8S_NGINX_IPADDRESS=
+export OSM_BASE_DOMAIN=
 export OSM_HELM_TIMEOUT=
 export OSM_CLUSTER_INGRESS_CLASS=
 export AUX_CLUSTER_INGRESS_CLASS=
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