CachingStore: change pushAll in pushLeastRecentlyBlock
CachingFreenetStoreTracker: do while{} in unregisterCachingFS and pushAllCachingStores
CachingFreenetStoreTest: check where is the block in testOnCollisions
CachingFreenetStoreTest: delete two useless lines
CachingFreenetStore: add size to avoid useless cycles in CachingFreenetStoreTracker
CachingFreenetStoreTracker: now use the size of CachingFreenetStore