Resolve L2SS-1047 "Upgrade ska base images"

Closes L2SS-1047

bin/start-jive.sh

@@ -17,7 +17,7 @@ display=${display:-${DISPLAY}}
 
 OPTIONS="-e HOME=/hosthome -e DISPLAY=${display} -e XAUTHORITY=/hosthome/.Xauthority -e TANGO_HOST=databaseds:10000 -v ${HOME}:/hosthome -v /tmp/.X11-unix:/tmp/.X11-unix"
 
-if [ ! -z ${XTRA_OPTIONS} ]; then
+if [ -n "${XTRA_OPTIONS}" ]; then
     OPTIONS="${OPTIONS} ${XTRA_OPTIONS}"
 fi
 
@@ -31,7 +31,7 @@ fi
 #docker run --rm -it --network host ${OPTIONS} nexus.engageska-portugal.pt/ska-docker/tango-java:latest ${command} ${@}
 container_name=artefact.skao.int/ska-tango-images-tango-java:9.3.4
 container=$(docker ps | grep -E ${container_name} | cut -d' ' -f1)
-if [ ! -z "${container}" ]; then
+if [ -n "${container}" ]; then
     docker exec -it "${container}" ${command} "${@}"
 else
     echo "Container \"${container_name}\" is not running."