Discovery service V1 to V2 upgrading guide (#1739)

I've added v2 for discovery setup. This is very similar to v1 found in
https://neo4j.com/docs/operations-manual/current/clustering/setup/discovery/,
with the exception that the settings names have been changed, and
example removed.

---------

Co-authored-by: sumyiren <[email protected]>
Co-authored-by: Reneta Popova <[email protected]>
Co-authored-by: NataliaIvakina <[email protected]>
Co-authored-by: Nick Giles <[email protected]>

Author: 5 people

modules/ROOT/images/discovery-service/in-place-1-v1-over-v2.png

@@ -9,9 +9,9 @@ This chapter describes the following:
 * Set up a cluster -- The basics of configuring and deploying a new cluster.
 ** xref:clustering/setup/deploy.adoc[Deploy a basic cluster] -- How to set up a basic cluster.
 ** xref:clustering/setup/analytics-cluster.adoc[Deploy an analytics cluster] -- How to deploy a special case Neo4j cluster for analytic queries.
-** xref:clustering/setup/single-to-cluster.adoc[Move from a standalone deployment to a cluster] -- This section describes how to move from a single Neo4j server to Neo4j cluster.
-** xref:clustering/setup/discovery.adoc[Cluster server discovery] -- How servers in a cluster discover each other.
-** xref:clustering/setup/routing.adoc[Leadership, routing, and load balancing] -- Election of leaders, routing, and load balancing.
+** xref:clustering/setup/single-to-cluster.adoc[Move from single server to cluster] -- This section describes how to move from a single Neo4j server to Neo4j cluster.
+** xref:clustering/setup/discovery.adoc[Cluster server discovery] -- How servers in a cluster discover each other and form a cluster.
+** xref:clustering/setup/routing.adoc[Leadership, routing and load balancing] -- Election of leaders, routing and load balancing.
 ** xref:clustering/setup/encryption.adoc[Intra-cluster encryption] -- How to secure the cluster communication.
 * xref:clustering/servers.adoc[Managing servers in a cluster] -- How to manage manage the servers in a cluster.
 * xref:clustering/databases.adoc[Managing databases in a cluster] -- How to manage the databases in a cluster.
@@ -25,7 +25,7 @@ This chapter describes the following:
 * xref:clustering/clustering-advanced/index.adoc[Advanced clustering] -- Some more advanced features of Neo4j clusters.
 ** xref:clustering/clustering-advanced/default-database.adoc[Default database in a cluster] -- The initial default database created when the DBMS starts for the first time.
 ** xref:clustering/clustering-advanced/multi-data-center-routing.adoc[Multi-data center routing] -- Clusters on mutli-data centers.
-** xref:clustering/clustering-advanced/reconciler.adoc[Reconciler] -- An internal component that observes the requested state of a server and makes changes to the server to match that state. 
+** xref:clustering/clustering-advanced/reconciler.adoc[Reconciler] -- An internal component that observes the requested state of a server and makes changes to the server to match that state.
 * xref:clustering/glossary.adoc[Clustering glossary] -- A glossary of terms related to the Neo4j clustering.