SERVICES: Fixed ldap service for dc base

- When dc object is base of perun entries, we must add it
  at least one structural class (domain).

- When getting current ldap state, load also dc object using
  filter on objectclass=dcObject.
Merge pull request #569 from zlamalp/ldapservice

SERVICES: Fixed ldap service for dc base
GUI: unselect services in table after force propagation is started
Merge pull request #570 from zlamalp/gui

GUI: unselect services in table after force propagation is started