[Tests] Increase frequency of reload to fix flaky tests (#32)

JDBC static scheduled reload tests were flaky, due to scheduled
reload not happening every test, due to a mismatch between sleep
time and schedule.

The Timecop scaling feature has no effect when testing the scheduler,
and hence is removed here.

Co-authored-by: Ry Biesemeyer <[email protected]>

Author: robbavey

spec/filters/integration/jdbc_static_spec.rb

@@ -4,7 +4,6 @@
 require "sequel"
 require "sequel/adapters/jdbc"
 require "stud/temporary"
-require "timecop"
 
 module LogStash module Filters
   describe JdbcStatic, :integration => true do
@@ -136,18 +135,16 @@ module LogStash module Filters
     describe "scheduled operation" do
       context "given a loader_schedule" do
         it "should properly schedule" do
-          settings["loader_schedule"] = "*/10 * * * * * UTC"
-          Timecop.travel(Time.now.utc - 3600)
-          Timecop.scale(60)
+          settings["loader_schedule"] = "*/3 * * * * * UTC"
           static_filter = JdbcStatic.new(settings)
           runner = Thread.new(static_filter) do |filter|
             filter.register
           end
-          sleep 3
+          runner.join(4)
+          sleep 4
           static_filter.filter(event)
           expect(static_filter.loader_runner.reload_count).to be > 1
           static_filter.close
-          Timecop.return
           expect(event.get("server")).to eq([{"ip"=>"10.3.1.1", "name"=>"mv-server-1", "location"=>"MV-9-6-4"}])
         end
       end