Users can now input a comma separated list of namenodes when writing
config for hdfs remotes.
This is required when you have multiple namenodes in your hdfs cluster
and cannot be certain which namenodes will be in 'standby' or 'active'
states.
This was available before but wasn't documented and didn't use the
correct rclone interfaces.
Before this change uploaded files could return the error "replication
in progress".
This error is harmless though and means the Close should be retried
which is what this patch does.
This includes an HDFS docker image to use with the integration tests.
Co-authored-by: Ivan Andreev <ivandeex@gmail.com>
Co-authored-by: Nick Craig-Wood <nick@craig-wood.com>
