check null pointers and influxdb parameters as options

ChaosMetadataService/api/control_unit/GetFullDescription.cpp

...sMetadataService/api/control_unit/SearchInstancesByUS.cpp

ChaosMetadataService/api/data_service/GetAllDataService.cpp

ChaosMetadataService/api/data_service/GetAssociationByDS.cpp

ChaosMetadataService/api/logging/GetLogForSourceUID.cpp

ChaosMetadataService/api/logging/SearchLogEntry.cpp

ChaosMetadataService/api/service/GetAllSnapshot.cpp

...etadataService/api/service/GetSnapshotDatasetsForNode.cpp

ChaosMetadataService/api/service/QueryDataCloud.cpp

...sMetadataService/api/unit_server/GetSetFullUnitServer.cpp

ChaosMetadataService/common/CUCommonUtility.cpp

ChaosMetadataService/object_storage/influxDB/InfluxDB.cpp

ChaosMetadataService/object_storage/influxDB/InfluxDB.h

...vice/object_storage/influxDB/InfluxDBLogStorageDriver.cpp

ChaosMetadataService/object_storage/influxDB/influxdb.hpp

...vice/persistence/mongodb/MongoDBControlUnitDataAccess.cpp

...dataService/persistence/mongodb/MongoDBNodeDataAccess.cpp

...taService/persistence/mongodb/MongoDBScriptDataAccess.cpp

...aService/persistence/mongodb/MongoDBUtilityDataAccess.cpp