change to gitlab terraform custom image

lib/gitlab/ci/templates/Terraform.gitlab-ci.yml

@@ -4,7 +4,7 @@
 # Entrypoint is also needed as image by default set `terraform` binary as an
 # entrypoint.
 image:
-  name: hashicorp/terraform:light
+  name: registry.gitlab.com/gitlab-org/gitlab-build-images:terraform
   entrypoint:
     - '/usr/bin/env'
     - 'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
@@ -18,7 +18,6 @@ cache:
     - .terraform
 
 before_script:
-  - apk update && apk add jq
   - alias convert_report="jq '([.resource_changes[].change.actions] | flatten) | {\"create\": (map(select(. == \"create\")) | length),\"update\":(map(select(. == \"update\")) | length),\"delete\": (map(select(. == \"delete\")) | length)}'"
   - terraform --version
   - terraform init