ISPN-3902 Upgrade to Apache Lucene 4.6.1
ISPN-3943 Fix L1WriteSynchronizerTest failures

* Increased timeout to make sure test doesn't fail incorrectly
ISPN-3944 DistSyncL1RepeatableReadFuncTest.testNoEntryInL1GetWithConcurrentReplace
random failures

* Changed L1LastChanceInterceptor invalidation to be sync
* This will be consistent now for tx and nontx caches