fix: reorder fields as composite primary keys for analytics tables

...s/2020-06-08-130000_add_analytics_podcasts_by_episode.php

...ns/2020-06-08-140000_add_analytics_podcasts_by_player.php

...s/2020-06-08-150000_add_analytics_podcasts_by_country.php

...ns/2020-06-08-160000_add_analytics_podcasts_by_region.php

...ns/2020-06-08-170000_add_analytics_website_by_browser.php

...ns/2020-06-08-180000_add_analytics_website_by_referer.php

...2020-06-08-190000_add_analytics_website_by_entry_page.php