Add dummy stubs for cs_fencetopo singleton from cs_property/resource

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Add dumy stubs for unit tests for cs_fencetopo

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>