[testlib] Drop override of assertItemsEqual method
The override is not compatible with underlying (standard) method because it
builds sets and rely on eid.
Closes #3641111.
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')