Defer publishing a ledger to clients until it accumulates sufficient

validations. We now have an open ledger, a last closed ledger, and a last
validated ledger. Normally, a ledger will be validated right after it
closes, but in edge cases, we might see a ledger close that then doesn't get
validated. This makes the code do the right thing.

src/cpp/ripple/Ledger.cpp

@@ -467,9 +467,6 @@ void Ledger::saveAcceptedLedger(bool fromConsensus, LoadEvent::pointer event)
 	theApp->getLedgerMaster().setFullLedger(shared_from_this());
 	event->stop();
 
-	// FIXME: Need to put on hold until the ledger acquires sufficient validations
-	theApp->getOPs().pubLedger(shared_from_this());
-
 	decPendingSaves();
 }