Fix: Apply consumer URI changes to all domains

See the associated bug report for a lenghty explanation of the issue
and of this fix. It fixes an issue when saving a live session's
configuration that was created by loading an .lttng file.

Fixes #866

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Cleanup: Missing whitespace

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>