shutdown after spec

Fixes #6236

logstash-core/lib/logstash/instrument/periodic_poller/jvm.rb

@@ -46,7 +46,7 @@ module LogStash module Instrument module PeriodicPoller
       collect_pools_metrics(raw)
       collect_threads_metrics
       collect_process_metrics
-      collect_gc_stats      
+      collect_gc_stats
     end
 
     private
@@ -104,10 +104,10 @@ module LogStash module Instrument module PeriodicPoller
       metric.gauge([:jvm], :uptime_in_millis, runtime_mx_bean.getUptime())
       collect_heap_metrics(data)
       collect_non_heap_metrics(data)
-    end  
+    end
 
     def collect_heap_metrics(data)
-      heap = aggregate_information_for(data["heap"].values)      
+      heap = aggregate_information_for(data["heap"].values)
       heap[:used_percent] = (heap[:used_in_bytes] / heap[:max_in_bytes].to_f)*100.0
 
       heap.each_pair do |key, value|

qa/integration/specs/monitoring_api_spec.rb

@@ -12,6 +12,10 @@ describe "Test Monitoring API" do
     @fixture.teardown
   }
   
+  after(:each) {
+    @fixture.get_service("logstash").teardown
+  }
+  
   let(:number_of_events) { 5 }
   let(:max_retry) { 120 }
 
@@ -19,7 +23,7 @@ describe "Test Monitoring API" do
     logstash_service = @fixture.get_service("logstash")
     logstash_service.start_with_stdin
     number_of_events.times { logstash_service.write_to_stdin("Hello world") }
-    
+
     begin
       sleep(1) while (result = logstash_service.monitoring_api.event_stats).nil?
     rescue