Reorganizes defaults vars file

No functional changes, but places the most relevant and readable vars
near the top now, so the file is more readable. Will include in README
as-is.

defaults/main.yml

@@ -1,11 +1,16 @@
 ---
-# defaults file for logstash-client
+# The libbeat packages to install. Options: filebeat, topbeat, packetbeat.
+logstash_client_beats_packages:
+  - filebeat
+  - topbeat
+
 logstash_client_ssl_certificate_base_directory: /etc/pki/tls/certs
 
 # Set to a cert filepath in order to copy to host and enable TLS
 # for shipping logs. TLS is disabled by default.
 logstash_client_ssl_certificate: ""
-logstash_client_ssl_certificate_fullpath: "{{ logstash_client_ssl_certificate_base_directory }}/{{ logstash_client_ssl_certificate | basename }}"
+logstash_client_ssl_certificate_fullpath: >-
+  "{{ logstash_client_ssl_certificate_base_directory }}/{{ logstash_client_ssl_certificate | basename }}"
 
 # Sane default of localhost. Override to set to the IP address of the Logstash server.
 # You can also inspect group membership, e.g.:
@@ -54,8 +59,3 @@ logstash_client_logfiles:
 logstash_client_extra_logfiles: []
 
 logstash_client_combined_logfiles: "{{ logstash_client_logfiles + logstash_client_extra_logfiles }}"
-
-# filebeats, topbeats, etc.
-logstash_client_beats_packages:
-  - filebeat
-  - topbeat