7087969: GarbageCollectorMXBean notification contains ticks vs millis

Reviewed-by: acorn, dcubed, rbackman

src/share/vm/services/gcNotifier.cpp

@@ -163,8 +163,8 @@ static Handle createGcInfo(GCMemoryManager *gcManager, GCStatInfo *gcStatInfo,TR
   constructor_args.push_oop(gcInfo_instance);
   constructor_args.push_oop(getGcInfoBuilder(gcManager,THREAD));
   constructor_args.push_long(gcStatInfo->gc_index());
-  constructor_args.push_long(gcStatInfo->start_time());
-  constructor_args.push_long(gcStatInfo->end_time());
+  constructor_args.push_long(Management::ticks_to_ms(gcStatInfo->start_time()));
+  constructor_args.push_long(Management::ticks_to_ms(gcStatInfo->end_time()));
   constructor_args.push_oop(usage_before_gc_ah);
   constructor_args.push_oop(usage_after_gc_ah);
   constructor_args.push_oop(extra_array);