chore : download setup script now is executed only once

.gitlab/ci/download/download.gitlab-ci.yml

@@ -7,10 +7,14 @@ include:
 ###################################################################################################
 .ubuntu:download:setup:
   script:
-    - GITLAB_ECLIPSE_URL="https://gitlab.eclipse.org"
-    - API_URL="$GITLAB_ECLIPSE_URL/api/v4"
-    - apt-get update -qq
-    - apt-get install -y -qq git unzip curl jq
+    - > 
+      if [[ ! $setup_completed ]] ; then
+        GITLAB_ECLIPSE_URL="https://gitlab.eclipse.org"
+        API_URL="$GITLAB_ECLIPSE_URL/api/v4"
+        apt-get update -qq
+        apt-get install -y -qq git unzip curl jq
+        setup_completed=true
+      fi
 
 .ubuntu:download:artifacts:
   # This script will retrieve the artifacts of latests successful specified job in every dependency.