WIP: file storage consistency tests

...n/java/org/caosdb/server/database/BackendTransaction.java

...base/backend/implementation/MySQL/MySQLGetVirtualFSO.java

...database/backend/implementation/MySQL/MySQLListFiles.java

.../implementation/MySQL/MySQLRetrieveAllUncheckedFiles.java

...nd/implementation/MySQL/MySQLSetFileCheckedTimestamp.java

...server/database/backend/interfaces/GetVirtualFSOImpl.java

...sdb/server/database/backend/interfaces/ListFilesImpl.java

...ase/backend/interfaces/RetrieveAllUncheckedFilesImpl.java

.../server/database/backend/transaction/GetFileIterator.java

...db/server/database/backend/transaction/GetVirtualFSO.java

...er/database/backend/transaction/ListFilesTransaction.java

...tabase/backend/transaction/RetrieveAllUncheckedFiles.java

.../org/caosdb/server/filesystem/FSODescriptorInterface.java

...va/org/caosdb/server/filesystem/FileStorageInterface.java

src/main/java/org/caosdb/server/filesystem/FileSystem.java

...n/java/org/caosdb/server/filesystem/LocalFileStorage.java

.../caosdb/server/filesystem/RealFSODescriptorInterface.java

.../org/caosdb/server/filesystem/TemporaryFSODescriptor.java

...rver/filesystem/consistency/AbstractConsistencyEvent.java

...aosdb/server/filesystem/consistency/ConsistencyCheck.java