Application Logs option cannot be specified for Elasticsearch version : 2.3 (same for 1.5)

[j00p34]

Describe the Bug

Module doesn't work with older ES versions (tested with 1.5 and 2.3)
log_publishing_options is not supported in older versions
Error creating ElasticSearch domain: InvalidTypeException: Application Logs option cannot be specified for Elasticsearch version : 2.3

Expected Behavior

Elasticsearch gets created

Steps to Reproduce

Set Elasticsearch version to 1.5 or 2.3

[JoostSaanen]

I've just made a PR for this: #103