remove not null constraints on location data

manifest

@@ -22,4 +22,5 @@ music_session_all_params.sql
 as_musician.sql
 bootstrap_users_v3.sql
 update_user_band_fields.sql
-add_recording_creator_id.sql
+add_recording_creator_id.sql
+make_location_nullable.sql

up/make_location_nullable.sql

@@ -0,0 +1,7 @@
+alter table users alter column city drop not null;
+alter table users alter column state drop not null;
+alter table users alter column country drop not null;
+
+alter table bands alter column city drop not null;
+alter table bands alter column state drop not null;
+alter table bands alter column country drop not null;