Modify ObservableCollapser JMH test to allow multiple response per argument

Author: Matt Jacobs

hystrix-core/src/jmh/java/com/netflix/hystrix/perf/ObservableCollapserPerfTest.java

@@ -61,7 +61,7 @@ public static class CollapserState {
         @Param({"1", "10", "100", "1000"})
         int numToCollapse;
 
-        @Param({"1"}) //until bugfix for https://github.com/Netflix/Hystrix/issues/865, 1 is only value that works as expected
+        @Param({"1", "10", "100"})
         int numResponsesPerArg;
 
         @Param({"1", "1000", "1000000"})