update main.yml and add descriptions

group_vars/all/main.yml

 ---
 
 soctoolsproxy: "CHANGE_ME_TO_FQDN"
-# example: soctoolsproxy: "vip.soctools.net"
+# example: soctoolsproxy: "server1.soctools.net"
+
+
+# Set next two  varibales if you are going to deploy cluster. standalone instalation does not require this varibales
 soctoolsproxy_vip: ""
 # example: soctoolsproxy_vip: "1.1.1.1"
 soctoolsproxy_vip_netmask: ""
 #soctoolsproxy_vip_netmask: "24"
 
+
+
 maxmind_key: ""
 
 docker_build_dir: "{{playbook_dir}}/build"