exec_spec.rb in logstash-output-exec-3.1.3

- old
+ new

@@ -1,5 +1,6 @@
 # encoding: utf-8
+require "logstash-core"
 require "logstash/outputs/exec"
 require "logstash/event"
 require "logstash/devutils/rspec/spec_helper"
 require "tempfile"
 