Fix EZP-22767: Added calls to ez_legacy_render_js and ez_legacy_render_css

This is needed in order to have ezjscore requirements loaded when using legacy modules.
Merge pull request #89 from ezsystems/ezp-22767-added_ezjcore_twig

Fix EZP-22767: Added calls to ez_legacy_render_js and ez_legacy_render_css