Merge lp:~crosser/duplicity/fix-small-file-upload into lp:~duplicity-team/duplicity/0.8-series

[Eugene Crosser]

I initially guessed that it was a bug in the Dropbox API and opened a ticket
https://github.com/dropbox/dropbox-sdk-python/issues/131
but it turns out that is was a deliberate breakage. Thus, this update is necessary.

After all three fixes, backup to dropbox works for me once again! Yay!

[lp:~crosser/duplicity/fix-small-file-upload]

1284. By Kenneth Loafman on 2017-11-28

* Merged in lp:~crosser/duplicity/fix-small-file-upload
  - Fixed small file upload changes made in Dropbox SDK v7.1

=== modified file 'duplicity/backends/dpbxbackend.py'
--- duplicity/backends/dpbxbackend.py	2017-11-25 22:12:14 +0000
+++ duplicity/backends/dpbxbackend.py	2017-11-27 20:12:03 +0000
@@ -215,7 +215,7 @@
         try:
             log.Debug('dpbx,files_upload(%s, [%d bytes])' % (remote_path, file_size))
 
-            res_metadata = self.api_client.files_upload(f, remote_path,
+            res_metadata = self.api_client.files_upload(f.read(), remote_path,
                                                         mode=WriteMode.overwrite,
                                                         autorename=False,
                                                         client_modified=None,