checkAccess operation in AzureFileSystemProvider should allow AccessMode.READ

[andrej-urvantsev]

At the moment(azure-storage-blob-nio version 12.0.0-beta.35) throws AccessDeniedException when you try to use Files.copy(azureBlobSource, localDestinationFile)

Reason is this snippet in the beginning of the method:

        if (accessModes != null && accessModes.length != 0) {
            throw LoggingUtility.logError(ClientLoggerHolder.LOGGER,
                new AccessDeniedException("The access cannot be determined."));
        }

Problem is that java.nio.file.CopyMoveHelper invokes it like this:

provider.checkAccess(source, AccessMode.READ);

Is it possible to change condition to following instead?

        if (accessModes != null && accessModes.length != 0 && (accessModes.length != 1 || accessModes[0] != AccessMode.READ)) {
            throw LoggingUtility.logError(ClientLoggerHolder.LOGGER,
                new AccessDeniedException("The access cannot be determined."));
        }