Document new parameters that appeared in Mitaka

Document following new knobs:

- certificate key pair that can be used to secure traffice between
  metadata agent (NSX Edge) and metadata proxy
- opportunity to allow metadata proxy listen additional ports
- opportunity to specify name servers for instances
- specify instance name servers that will be used when DHCP is turned
  off
- switch to init metadata service

Change-Id: I39fe45411ad2f11ad2ac41ac43557f5ce6aa74ac

doc/user/source/configuration.rst

@@ -94,6 +94,10 @@ Plugin contains the following settings:
 
    To enable Nova metadata service, the following settings must be set:
 
+#. Init metadata infrastructure -- If enabled, instance will attempt to
+   initialize the metadata infrastructure to access to metadata proxy  service,
+   otherwise metadata proxy will not be deployed.
+
 #. Use management network to access the nova-api-metadata -- configure
    nova-api-metadata service to listen on OpenStack management network. If
    disabled nova-api-metadata will listen on Public network.
@@ -102,6 +106,15 @@ Plugin contains the following settings:
    automatic IP address allocation, if disabled then user have to manually
    specify IP address, netmask and gateway to avoid possible collisions.
 
+#. Certificate for metadata proxy -- certificate in PEM format that will be
+   used to secure connection between metadata proxy and metadata agent (NSX
+   Edge).
+
+#. Private key -- key that was used to generate aforementioned certificate.
+
+#. Metadata allowed ports -- comma separated list of TCP port allowed access to
+   the metadata proxy, in addition to 80, 443 and 8775.
+
 #. Metadata portgroup MoRef ID -- portgroup MoRef ID for metadata proxy service.
 
 #. Metadata proxy IP addresses -- comma separated IP addresses used by Nova
@@ -129,6 +142,9 @@ Plugin contains the following settings:
    If you tick *Additional settings* checkbox following options will become
    available for configuration:
 
+#. Instance name servers -- comma separated IP addresses of name servers that
+   will be passed to instance.
+
 #. Task status check interval -- asynchronous task status check interval,
    default is 2000 (millisecond).
 

environment_config.yaml

@@ -119,7 +119,7 @@ attributes:
   nsxv_metadata_initializer:
     value: true
     label: 'Init metadata infrastructure'
-    description: 'If True, the server instance will attempt to initialize the metadata infrastructure for access to nova-metadata service'
+    description: 'If enabled, instance will attempt to initialize the metadata infrastructure to access to metadata proxy  service'
     weight: 86
     type: 'checkbox'
   nsxv_metadata_listen_mgmt: