Update docker image

.gitlab-ci.yml

 image:
-  name: nexus.engageska-portugal.pt/ska-docker/tango-dsconfig
-
-# The following variables are automatically passed down to the tangodb container
-# as well as the tangodatabaseds container and available within each.
-variables:
-  MYSQL_ROOT_PASSWORD: "secret"
-  MYSQL_DATABASE: "tango"
-  MYSQL_USER: "tango"
-  MYSQL_PASSWORD: "tango"
-  MYSQL_HOST: "tangodb"
-  TANGO_HOST: "localhost:10000"
+        name: artefact.skatelescope.org/ska-tango-images-tango-dsconfig:1.5.5
 
 stages:
   - build
@@ -17,11 +7,7 @@ stages:
 
 build_job:
   stage: build
-  before_script:
-    #TODO: remove procps use for ps
-    - sudo apt update && sudo apt -y --no-install-recommends install build-essential cmake pkg-config libboost-thread-dev procps
   script:
-    #- make
     - mkdir build && cd build
     - cmake -DBUILD_TESTS=ON ..
     - make
@@ -33,23 +19,15 @@ build_job:
 
 test_load_job:
   stage: test
-  before_script:
-    #TODO: remove procps use for ps
-    - sudo apt update && sudo apt -y --no-install-recommends install libboost-thread-dev procps
   script:
     - sleep 10
     - /usr/local/bin/DataBaseds 2 -ORBendPoint giop:tcp::10000 &
     - sleep 10
     - exit_code=2
     - json2tango -w -a -u ./test/ah_config.json || exit_code=$?
-    # json2tango returns 2 if values written to DB
     - if [ ${exit_code} -ne 2 ]; then echo "Tango DB configuration failed!" ; else echo "Tango DB configuration succedeed!"; fi
-    - sleep 5
     - ./build/alarm-handler-srv 01 &
     - ./build/bin/testdevice-srv 01 &
-    - sleep 10
-    - ps -ef | grep alarm-handler-srv | grep -v grep
-    - ps -ef | grep testdevice-srv | grep -v grep
     - sleep 5
     - python ./test/load-alarm-conf.py --device=alarm/handler/01 --load="tag=test0;formula=(alarm/test/01/condition == 1);on_delay=0;off_delay=0;priority=high;shlvd_time=0;group=gr_test;message=Test alarm;url=;on_command=;off_command=;enabled=1"
     - sleep 1