exchange: fix bad indentation
Those two lines where double indented for no good reasons.
This is backport of
71931b789424.
exchange: propagate arguments to the _getbundleextrapart function
The arguments was wrongly propagated (again).
This a backport of
0055b5b3eb9c
bundle2: fix configuration name mismatch
During pulls bundle2 was checking server.bundle2, but during pushes it was
checking experimental.bundle2. This makes them both experimental.bundle2.
This is a backport of
750c7c14a637