[AETHER-72][AETHER-75] Update atomix to 3.1.9

Change-Id: I60192953f0ebef6730ad6268b10bbf8a59934156
diff --git a/tools/test/scenarios/odtn/createOdtnCell.sh b/tools/test/scenarios/odtn/createOdtnCell.sh
index 91f9197..8e5f74d 100755
--- a/tools/test/scenarios/odtn/createOdtnCell.sh
+++ b/tools/test/scenarios/odtn/createOdtnCell.sh
@@ -16,7 +16,7 @@
 echo "The public key in local host is: $SSH_KEY"
 
 # Create Atomix cluster using Atomix docker image
-ATOMIX_IMAGE=atomix/atomix:3.1.5
+ATOMIX_IMAGE=atomix/atomix:3.1.9
 for i in {1..3}; do
     echo "Setting up atomix-$i..."
     docker container run --detach --name atomix-$i --hostname atomix-$i \