lucene-cli: Made appsettings.json file optional (See #453)
lucene-cli: Made appsettings.json file optional (See #453)

NightOwl888/lucenenet,apache/lucenenet,jeme/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet,apache/lucenenet,apache/lucenenet