[dataimport] separate entities table from other metadata in SQLGenObjectStore 'entities' needs to be updated first as every other table has references to its rows. Remove use of thread-local storage in the process. related to #9177565.

option_group_changed('port', 'main', 'web')
option_group_changed('query-log-file', 'main', 'web')
option_group_changed('profile', 'main', 'web')
option_group_changed('max-post-length', 'main', 'web')