bug #1818: Don't start b10-auth, xfrin, xfrout, zonemgr in default config

The bug #1818 is just about not starting b10-auth, but this currently
implies that b10-xfrin, b10-xfrout and b10-zonemgr should also be
disabled.

src/bin/bind10/bob.spec

@@ -8,10 +8,6 @@
         "item_type": "named_set",
         "item_optional": false,
         "item_default": {
-          "b10-auth": { "special": "auth", "kind": "needed" },
-          "b10-xfrin": { "address": "Xfrin", "kind": "dispensable" },
-          "b10-xfrout": { "address": "Xfrout", "kind": "dispensable" },
-          "b10-zonemgr": { "address": "Zonemgr", "kind": "dispensable" },
           "b10-stats": { "address": "Stats", "kind": "dispensable" },
           "b10-stats-httpd": {
             "address": "StatsHttpd",