fix(confd): give controller/router /deis access

Both components require access to /deis/domains, which holds the
keys for all application domains. Since /deis/domains does not
exist at first boot, confd will complain that /deis/domains
does not exist as a key if you supply it to the keys list. Since
the /deis key always exists, setting the keyspace one level lower
fixes this issue.

controller/conf.d/confd_settings.toml

@@ -5,10 +5,7 @@ uid = 1000
 gid = 1000
 mode  = "0640"
 keys = [
-  "/deis/controller",
-  "/deis/cache",
-  "/deis/database",
-  "/deis/registry",
+  "/deis",
 ]
 check_cmd = "test -e {{ .src }}"
 reload_cmd = "/app/bin/reload"