TT#37257 Fix shellcheck 0.4.6 warning SC2199: Arrays implicitly concatenate in [[ ]]

257:9   shellcheck:error   Arrays implicitly concatenate in [[ ]]. Use a loop (or explicit * instead of @). [SC2199]

Change-Id: I49504d5b1a8d8ae021d4d6c6465639d58a2670e3

templates/scripts/includes/deployment.sh

@@ -254,7 +254,7 @@ is_package_installed() {
 }
 
 ensure_packages_installed() {
-  [[ -z "${ADDITINAL_PACKAGES[@]}" ]] && return 0
+  [[ -z "${ADDITINAL_PACKAGES[*]}" ]] && return 0
 
   local install_packages
   install_packages=()