update knot role to support more operational variety

Now secondary zones, dynamic zones, interpeted catalog zones, etc.
are supported by our knot role

roles/knot/defaults/main.yaml

@@ -1,2 +1,11 @@
 ---
-knot__remotes: [ ]
+knot__deploy_prometheus_exporter: true
+knot__log_level: info
+knot__remotes: []
+knot__keys: []
+knot__catalog_zones: []
+knot__primary_zones: []
+knot__catalog_secondary_zones: []
+knot__secondary_zones: []
+knot__dynamic_zones: []
+knot__acls: []