CE-EE parity for prepare_build script
This removes EE-only directives in favor of file existence checks.
EE version: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8846
Edited by Robert Speicher
This removes EE-only directives in favor of file existence checks.
EE version: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8846