Add dummy stubs for unit tests for cs_fencetopo type & provider

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Fix topology crafting, finish unit tests for cs_fenctopo type

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Add fence topology to cs_fencetopo fixtures

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Fix fecncetopo type & provider and finish unit tests as well

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>