Parameterized the nbi docker image version

Change-Id: I07a4dfcd216c60fc44f620308d0f4c3b34ab63d5
Issue-ID: EXTAPI-118
Signed-off-by: Quoc-Nghia Nguyen <quocnghia.nguyen@orange.com>
diff --git a/test/csit/scripts/externalapi-nbi/start_nbi_containers.sh b/test/csit/scripts/externalapi-nbi/start_nbi_containers.sh
index 61026d7..1d1d0fd 100644
--- a/test/csit/scripts/externalapi-nbi/start_nbi_containers.sh
+++ b/test/csit/scripts/externalapi-nbi/start_nbi_containers.sh
@@ -16,8 +16,8 @@
 
 NEXUS_USERNAME=docker
 NEXUS_PASSWD=docker
-NEXUS_DOCKER_REPO=nexus3.onap.org:10001
-DOCKER_IMAGE_VERSION=latest
+export NEXUS_DOCKER_REPO=nexus3.onap.org:10001
+export DOCKER_IMAGE_VERSION=latest
 
 echo "This is ${WORKSPACE}/test/csit/scripts/externalapi-nbi/start_nbi_containers.sh"