Fix cluster related Docker env variables (neo4j#2345) (neo4j#2348)

Author: NataliaIvakina

modules/ROOT/pages/docker/clustering.adoc

@@ -33,9 +33,9 @@ docker run --name=server1 --detach \
          --publish=6000:6000 --publish=7000:7000 \
          --hostname=public-address \
          --env NEO4J_dbms_cluster_endpoints=server1-public-address:6000,server2-public-address:6000,server3-public-address:6000 \
-         --env NEO4J_server_cluster_advertised_address=public-address:6000 \
-         --env NEO4J_server_cluster.raft.advertised_address=public-address:7000 \
-         --env NEO4J_server_default_advertised_address=public-address \
+         --env NEO4J_server_cluster_advertised__address=public-address:6000 \
+         --env NEO4J_server_cluster.raft.advertised__address=public-address:7000 \
+         --env NEO4J_server_default_advertised__address=public-address \
          --env NEO4J_ACCEPT_LICENSE_AGREEMENT=yes \
          --env NEO4J_server_bolt_advertised__address=public-address:7687 \
          --env NEO4J_server_http_advertised__address=public-address:7474 \

modules/ROOT/pages/tutorial/tutorial-clustering-docker.adoc

@@ -271,8 +271,8 @@ The following environment variables are specific to the Neo4j cluster, and are a
 
 * `+NEO4J_initial_server_mode__constraint+`: the database mode, defaults to `NONE`, can be set to `PRIMARY` or `SECONDARY`.
 * `+NEO4J_dbms_cluster_endpoints+`: a comma-separated list of endpoints, which a server should contact to discover other cluster servers.
-* `+NEO4J_server.cluster.advertised_address+`: hostname/IP address and port to advertise for transaction handling and discovery service.
-* `+NEO4J_server.cluster.raft.advertised_address+`: hostname/IP address and port to advertise for cluster communication.
+* `+NEO4J_server_cluster_advertised__address+`: hostname/IP address and port to advertise for transaction handling and discovery service.
+* `+NEO4J_server_cluster_raft_advertised__address+`: hostname/IP address and port to advertise for cluster communication.
 
 See xref:clustering/settings.adoc[] for more details of Neo4j cluster settings.