Added a short-hand for setting the OCI variable.
Added export.

Change-Id: I1e9b5366ce460995d494f7df81659fea0b6c8584
diff --git a/tools/test/bin/onos-show-cell b/tools/test/bin/onos-show-cell
index 5aee338..559ecaf 100755
--- a/tools/test/bin/onos-show-cell
+++ b/tools/test/bin/onos-show-cell
@@ -25,7 +25,7 @@
     cell="${1}"
 else
     if [ -z "${ONOS_CELL}" ]; then
-        echo "Environmental variable 'ONOS_CELL' is not defiled"
+        echo "Environmental variable 'ONOS_CELL' is not defined"
         exit 1
     else
         cell="${ONOS_CELL}"