[Test] Synchronous evicts may cause a deadlock

[20:22:49,442][INFO ][start-stop-thread-1][GridDataLoaderProcessorSelfTest] >>>>>>> Started node: 2ed6cd2e-f581-4831-81e5-7e8063e020c4
java.lang.Exception: <20:22:49,911><DEBUG><gridgain-#1467%dataload.GridDataLoaderProcessorSelfTest4%> >>>>>>>>>>>>>>>>>>>
	at org.gridgain.grid.util.GridUtils.dumpStack(GridUtils.java:661)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.GridDhtPartitionTopologyImpl.wLock(GridDhtPartitionTopologyImpl.java:179)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.GridDhtPartitionTopologyImpl.onEvicted(GridDhtPartitionTopologyImpl.java:1105)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.preloader.GridDhtPreloader.onPartitionEvicted(GridDhtPreloader.java:475)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.GridDhtLocalPartition.tryEvict(GridDhtLocalPartition.java:393)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.GridDhtLocalPartition.onRemoved(GridDhtLocalPartition.java:188)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.GridDhtPartitionTopologyImpl.onRemoved(GridDhtPartitionTopologyImpl.java:567)
	at org.gridgain.grid.kernal.processors.cache.distributed.dht.GridDhtCacheEntry.onMarkedObsolete(GridDhtCacheEntry.java:97)
	at org.gridgain.grid.kernal.processors.cache.GridCacheMapEntry.evictInternal(GridCacheMapEntry.java:2187)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager.evict0(GridCacheEvictionManager.java:693)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager.access$2200(GridCacheEvictionManager.java:49)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager$EvictionFuture.prepare0(GridCacheEvictionManager.java:1678)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager$EvictionFuture.prepare(GridCacheEvictionManager.java:1591)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager.addToCurrentFuture(GridCacheEvictionManager.java:1052)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager.checkEvictionQueue(GridCacheEvictionManager.java:1008)
	at org.gridgain.grid.kernal.processors.cache.GridCacheEvictionManager.unwind(GridCacheEvictionManager.java:1278)
	at org.gridgain.grid.kernal.processors.cache.GridCacheUtils.unwindEvicts(GridCacheUtils.java:1402)
	at org.gridgain.grid.kernal.processors.cache.GridCacheIoManager.processUnordered(GridCacheIoManager.java:210)
	at org.gridgain.grid.kernal.processors.cache.GridCacheIoManager.access$500(GridCacheIoManager.java:35)
	at org.gridgain.grid.kernal.processors.cache.GridCacheIoManager$1.onMessage(GridCacheIoManager.java:113)
	at org.gridgain.grid.kernal.managers.communication.GridIoManager$GridFilteredMessageListener.onMessage(GridIoManager.java:1612)
	at org.gridgain.grid.kernal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:675)
	at org.gridgain.grid.kernal.managers.communication.GridIoManager.access$1900(GridIoManager.java:50)
	at org.gridgain.grid.kernal.managers.communication.GridIoManager$6.body(GridIoManager.java:636)
	at org.gridgain.grid.util.worker.GridWorker.run(GridWorker.java:139)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:722)

    private void wLock() {
        int cnt0 = cnt.get();

        if (cnt0 > 0)
            U.dumpStack(">>>>>>>>>>>>>>>>>>>");

        lock.writeLock().lock();
    }