Address Administrative Area options variable

@sergii-tkachenko Can you please review?

Sets a variable of State options to use in dropdowns where we also collect additional User addresses, to fix bug reported in comments of https://jira.dosomething.org/browse/DS-452

Adds a function `dosomething_user_set_address_administrative_area_options` to use for international sites (e.g. `drush php-eval "dosomething_user_set_address_administrative_area_options('CA')")` will populate the options for Canada.
Yeah.. that's not a bad idea, I will add that.  The ideal would be to pass a country code variable here, per https://jira.dosomething.org/browse/INF-17.. although i haven't quite figured out what we'd do in the UK, where there could be various countries.