Update README.md for an easier CCR local testing setup

x-pack/plugins/cross_cluster_replication/README.md

@@ -5,11 +5,8 @@
 You can run a local cluster and simulate a remote cluster within a single Kibana directory.
 
 1. Start your "local" cluster by running `yarn es snapshot --license=trial` and `yarn start` to start Kibana.
-2. Download Elasticsearch repository, preferably to a folder adjacent to Kibana.
-3. Start your "remote" cluster by running `yarn es source --source-path={PATH/TO/ELASTICSEARCH/REPOSITORY} --license=trial -E cluster.name=europe -E transport.port=9400`.
-    - Parameter `--source-path` defaults to `../elasticsearch` and can be omitted if Elasticsearch repository is at the same level as Kibana: 
-    `yarn es source --license=trial -E cluster.name=europe -E transport.port=9400`.
-4. Index a document into your remote cluster by running `curl -X PUT http://elastic:changeme@localhost:9201/my-leader-index --data '{"settings":{"number_of_shards":1,"soft_deletes.enabled":true}}' --header "Content-Type: application/json"`.
+2. Start your "remote" cluster by running `yarn es source --license=trial -E cluster.name=europe -E transport.port=9400` in a separate terminal tab.
+3. Index a document into your remote cluster by running `curl -X PUT http://elastic:changeme@localhost:9201/my-leader-index --data '{"settings":{"number_of_shards":1,"soft_deletes.enabled":true}}' --header "Content-Type: application/json"`.
 Note that these settings are required for testing auto-follow pattern conflicts errors (see below).
 
 Now you can create follower indices and auto-follow patterns to replicate the `my-leader-index`