Restore dependency to jruby-win32ole

During the split between core and contrib, the jruby-win32ole dependency was removed in this commit
https://github.com/elasticsearch/logstash/commit/bc2e9b677bdee5faf72d1a18c4012602a94c76fc

However it is required by the eventlog input that is still a core plugin.
Fix LOGSTASH-2004 and LOGSTASH-2227