ipatests: collect samba logs when setting up trust to AD
    
    In many cases it is impossible to investigate test failures of
    environments where a trust to Active Directory is establishe without
    Samba logs.
    
    Collect Samba logs by default and make sure Samba is configured with
    higher log levels if we are going to configure IPA to setup trust to
    Active Directory.
    
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>