Code review update

Change-Id: I384a73efe995c529fb4b3636cb9639eafb90787f
Signed-off-by: Joakim Roubert <joakimr@axis.com>

cluster/gce/gci/configure-helper.sh

@@ -253,9 +253,7 @@ function get-or-generate-uuid(){
   else
     # generate new uuid and add it to the map
     local myuuid
-    myuuid=$(uuidgen)
-    # shellcheck disable=SC2181
-    if [[ $? -ne 0 ]]; then
+    if ! myuuid=$(uuidgen); then
       echo "Failed to generate valid UUID with uuidgen" >&2
       exit 2
     fi