fixed the ccs creation, and delete of the snapshot. remain to test the restore

ChaosDataService/db_system/MongoDBDriver.cpp

ChaosDataService/db_system/mongo_db_types.h

ChaosMetadataService/api/service/DeleteSnapshot.cpp

ChaosMetadataService/api/service/ServiceApiGroup.cpp

...ataService/persistence/data_access/SnapshotDataAccess.cpp

...Service/persistence/mongodb/MongoDBSnapshotDataAccess.cpp

...etadataServiceClient/api_proxy/service/GetAllSnapshot.cpp

...hotUtility/ChaosSnapshotUtility.xcodeproj/project.pbxproj

ccs/ccs.pro

ccs/snapshot/NewSnapshot.cpp

ccs/snapshot/NewSnapshot.h

ccs/snapshot/NewSnapshot.ui

ccs/snapshot/NodeListModel.cpp

ccs/snapshot/NodeListModel.h

ccs/snapshot/SnapshotManager.cpp

ccs/snapshot/SnapshotManager.h