Fix performance tests

- date speed test only run when performance is enabled

Fixes #1758

Author: Richard Pijnenburg

spec/performance/date.rb

@@ -1,11 +1,11 @@
-require "test_utils"
+require "spec_helper"
 require "logstash/filters/date"
 
 puts "Skipping date tests because this ruby is not jruby" if RUBY_ENGINE != "jruby"
-describe LogStash::Filters::Date, :if => RUBY_ENGINE == "jruby" do
-  extend LogStash::RSpec
+describe LogStash::Filters::Date, :if => RUBY_ENGINE == "jruby", :performance => true do
+  
 
-  describe "speed test of date parsing", :performance => true do
+  describe "speed test of date parsing" do
     it "should be fast" do
       event_count = 100000
       min_rate = 4000

spec/performance/speed.rb

@@ -1,7 +1,7 @@
-require "test_utils"
+require "spec_helper"
 
 describe "speed tests", :performance => true do
-  extend LogStash::RSpec
+  
   count = 1000000
 
   config <<-CONFIG