Fix UBSAN report

/home/anoyes/workspace/foundationdb/fdbserver/Ratekeeper.actor.cpp:86:8: runtime error: load of value 1231493777, which is not a valid value for type 'limitReason_t'
    #0 0x310e961 in StorageQueueInfo::StorageQueueInfo(StorageQueueInfo&&) /home/anoyes/workspace/foundationdb/fdbserver/Ratekeeper.actor.cpp:86
    #1 0x310eacd in MapPair<UID, StorageQueueInfo>::MapPair<UID, StorageQueueInfo>(UID&&, StorageQueueInfo&&) /home/anoyes/workspace/foundationdb/flow/IndexedSet.h:242
    #2 0x310b35e in MapPair<std::decay<UID>::type, std::decay<StorageQueueInfo>::type> mapPair<UID, StorageQueueInfo>(UID&&, StorageQueueInfo&&) /home/anoyes/workspace/foundationdb/flow/IndexedSet.h:258
    #3 0x30a8b79 in a_body1 /home/anoyes/workspace/foundationdb/fdbserver/Ratekeeper.actor.cpp:195
    apple#4 0x309b529 in TrackStorageServerQueueInfoActor /home/anoyes/build/foundationdb/fdbserver/Ratekeeper.actor.g.cpp:495
    apple#5 0x309b9be in trackStorageServerQueueInfo(RatekeeperData* const&, StorageServerInterface const&) /home/anoyes/workspace/foundationdb/fdbserver/Ratekeeper.actor.cpp:194
    apple#6 0x30cff63 in a_body1loopBody1when1cont1 /home/anoyes/workspace/foundationdb/fdbserver/Ratekeeper.actor.cpp:303
    apple#7 0x30cd9da in a_body1loopBody1when1when1 /home/anoyes/build/foundationdb/fdbserver/Ratekeeper.actor.g.cpp:1170
    apple#8 0x30ed4dd in a_callback_fire /home/anoyes/build/foundationdb/fdbserver/Ratekeeper.actor.g.cpp:1185
    apple#9 0x30e6d81 in fire /home/anoyes/workspace/foundationdb/flow/flow.h:998
    apple#10 0x4df0dc in void SAV<Void>::send<Void>(Void&&) /home/anoyes/workspace/foundationdb/flow/flow.h:447
    apple#11 0x959891 in void Promise<Void>::send<Void>(Void&&) const /home/anoyes/workspace/foundationdb/flow/flow.h:778
    apple#12 0x7b4b018 in Sim2::execTask(Sim2::Task&) (/home/anoyes/build/foundationdb/bin/fdbserver+0x7b4b018)
    apple#13 0x7bf9168 in Sim2::RunLoopActorState<Sim2::RunLoopActor>::a_body1loopBody1cont1(Void const&, int) /home/anoyes/workspace/foundationdb/fdbrpc/sim2.actor.cpp:979
    apple#14 0x7be7b68 in Sim2::RunLoopActorState<Sim2::RunLoopActor>::a_body1loopBody1when1(Void const&, int) /home/anoyes/build/foundationdb/fdbrpc/sim2.actor.g.cpp:5391
    apple#15 0x7c329ff in Sim2::RunLoopActorState<Sim2::RunLoopActor>::a_callback_fire(ActorCallback<Sim2::RunLoopActor, 0, Void>*, Void) /home/anoyes/build/foundationdb/fdbrpc/sim2.actor.g.cpp:5406
    apple#16 0x7c1fc73 in ActorCallback<Sim2::RunLoopActor, 0, Void>::fire(Void const&) /home/anoyes/workspace/foundationdb/flow/flow.h:998
    apple#17 0x4df0dc in void SAV<Void>::send<Void>(Void&&) /home/anoyes/workspace/foundationdb/flow/flow.h:447
    apple#18 0x959891 in void Promise<Void>::send<Void>(Void&&) const /home/anoyes/workspace/foundationdb/flow/flow.h:778
    apple#19 0x7fe74a4 in N2::PromiseTask::operator()() /home/anoyes/workspace/foundationdb/flow/Net2.actor.cpp:481
    apple#20 0x7fb6ff7 in N2::Net2::run() /home/anoyes/workspace/foundationdb/flow/Net2.actor.cpp:657
    apple#21 0x7b71bd3 in Sim2::_runActorState<Sim2::_runActor>::a_body1(int) /home/anoyes/workspace/foundationdb/fdbrpc/sim2.actor.cpp:989
    apple#22 0x7b2ee51 in Sim2::_runActor::_runActor(Sim2* const&) /home/anoyes/build/foundationdb/fdbrpc/sim2.actor.g.cpp:5608
    apple#23 0x7b2f268 in Sim2::_run(Sim2* const&) /home/anoyes/workspace/foundationdb/fdbrpc/sim2.actor.cpp:987
    apple#24 0x7b2f2c8 in Sim2::run() /home/anoyes/workspace/foundationdb/fdbrpc/sim2.actor.cpp:996
    apple#25 0x21040a6 in main /home/anoyes/workspace/foundationdb/fdbserver/fdbserver.actor.cpp:1793
    apple#26 0x7f03492ba504 in __libc_start_main (/lib64/libc.so.6+0x22504)
    apple#27 0x464914  (/home/anoyes/build/foundationdb/bin/fdbserver+0x464914)

fdbserver/Ratekeeper.actor.cpp

@@ -94,11 +94,12 @@ struct StorageQueueInfo {
 	Smoother smoothFreeSpace;
 	Smoother smoothTotalSpace;
 	limitReason_t limitReason;
-	StorageQueueInfo(UID id, LocalityData locality) : valid(false), id(id), locality(locality), smoothDurableBytes(SERVER_KNOBS->SMOOTHING_AMOUNT),
-		smoothInputBytes(SERVER_KNOBS->SMOOTHING_AMOUNT), verySmoothDurableBytes(SERVER_KNOBS->SLOW_SMOOTHING_AMOUNT),
-		verySmoothDurableVersion(SERVER_KNOBS->SLOW_SMOOTHING_AMOUNT), smoothLatestVersion(SERVER_KNOBS->SMOOTHING_AMOUNT), smoothFreeSpace(SERVER_KNOBS->SMOOTHING_AMOUNT),
-		smoothTotalSpace(SERVER_KNOBS->SMOOTHING_AMOUNT)
-	{
+	StorageQueueInfo(UID id, LocalityData locality)
+	  : valid(false), id(id), locality(locality), smoothDurableBytes(SERVER_KNOBS->SMOOTHING_AMOUNT),
+	    smoothInputBytes(SERVER_KNOBS->SMOOTHING_AMOUNT), verySmoothDurableBytes(SERVER_KNOBS->SLOW_SMOOTHING_AMOUNT),
+	    verySmoothDurableVersion(SERVER_KNOBS->SLOW_SMOOTHING_AMOUNT),
+	    smoothLatestVersion(SERVER_KNOBS->SMOOTHING_AMOUNT), smoothFreeSpace(SERVER_KNOBS->SMOOTHING_AMOUNT),
+	    smoothTotalSpace(SERVER_KNOBS->SMOOTHING_AMOUNT), limitReason(limitReason_t::unlimited) {
 		// FIXME: this is a tacky workaround for a potential uninitialized use in trackStorageServerQueueInfo
 		lastReply.instanceID = -1;
 	}