Reload principal

Created by: xkureck

When creating new entity(vo) the user gets automatically in perun vo admin rule for this vo. But that information isnt getting to us in the GUI. We store the data about user roles in perunPrincipal. We need to reload perunPrincipal to get the new information about user rules. With updated perunPrincipal we evaluate correctly if user is or is not admin of some entity. The problem is definitely when creating vo, facility, group. Please explore if the bug is anywhere else.