Merge AD trust configurator into server installer
    
    ipa-server-install is now able to configure Samba and winbind services
    and manage trusts to Active Directory right off the bat with following
    alterations from standalone installer:
    
       * sidgen task is always triggered since there are only a few entries
         to tag in the beginning
    
       * the `--add-agents` option is hardcoded to False, as there are no
         potential agents to resolve and addd when setting up the first
         master in topology
    
    https://fedorahosted.org/freeipa/ticket/6630
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>