logstash 1.5

[nusnewob]

logstash 1.5 releases don't have logstash-contrib package anymore, which cause the install to fail.

vars:
  elk_logstash:
    version: 1.5

TASK: [bakhti.elk | Install logstash apt packages] ****************************
<xxx.xxx.xxx.xxx> REMOTE_MODULE apt pkg=logstash,logstash-contrib update_cache=yes state=present
failed: [xxx.xxx.xxx.xxx] => (item=logstash,logstash-contrib) => {"failed": true, "item": "logstash,logstash-contrib"}
msg: No package matching 'logstash-contrib' is available