modify_order_inapplicable
initial attrs:
         objectclass: 'user'
           givenName: 'a'
== result ===[  2]=======================
ERR_NO_SUCH_ATTRIBUTE (16)
-- operations ---------------------------
       dhcpSites replace  b
       dhcpSites add      c
       dhcpSites delete   b
----------------------------------
       dhcpSites add      c
       dhcpSites replace  b
       dhcpSites delete   b
----------------------------------
== result ===[  4]=======================
ERR_OBJECT_CLASS_VIOLATION (65)
-- operations ---------------------------
       dhcpSites replace  b
       dhcpSites delete   b
       dhcpSites add      c
----------------------------------
       dhcpSites delete   b
       dhcpSites replace  b
       dhcpSites add      c
----------------------------------
       dhcpSites delete   b
       dhcpSites add      c
       dhcpSites replace  b
----------------------------------
       dhcpSites add      c
       dhcpSites delete   b
       dhcpSites replace  b
----------------------------------