Google maps Api – development purpose only

Hi,
We have problem with google maps – for development only. We have API key and some code we added to last row in function.php, but we have same problem with it.
Can you help me, please ? We have WordPress 4.4.2 and Enfold theme without input for past API code.

This code we added to last row in function.php.

// Add scripts to wp_head()
function child_theme_head_script() { ?>
<script id=’avia_gmaps_framework_globals’ type=’text/javascript’>
/* <![CDATA[ */
var avia_framework_globals = avia_framework_globals || {};
avia_framework_globals.gmap_api = ‘AIzaSyBP0fL4IzWwXEZB648iv2I5FUS5D4LdG8Q’;
avia_framework_globals.gmap_maps_loaded = ‘https://maps.googleapis.com/maps/api/js?v=3.30&key=AIzaSyBP0fL4IzWwXEZB648iv2I5FUS5D4LdG8Q&callback=aviaOnGoogleMapsLoaded’;
avia_framework_globals.gmap_builder_maps_loaded = ‘https://maps.googleapis.com/maps/api/js?v=3.30&key=AIzaSyBP0fL4IzWwXEZB648iv2I5FUS5D4LdG8Q&callback=av_builder_maps_loaded’;
avia_framework_globals.gmap_backend_maps_loaded = ‘https://maps.googleapis.com/maps/api/js?v=3.30&callback=av_backend_maps_loaded’;
avia_framework_globals.gmap_source = ‘https://maps.googleapis.com/maps/api/js?v=3.30&key=AIzaSyBP0fL4IzWwXEZB648iv2I5FUS5D4LdG8Q’;
avia_framework_globals.gmap_avia_api = ‘http://www.fusteriahenares.com/wp-content/themes/enfold/framework/js/conditional_load/avia_google_maps_api.js’;
/* ]]> */
</script>
<?php }
add_action( ‘wp_head’, ‘child_theme_head_script’ );

Thanks a lot.
Regards Lukas.