red_worker: fix incorrect is_low_bandwidth after migrating a low bandwidth connection
red_worker: fix incorrect is_low_bandwidth after migrating a low bandwidth connection

rhbz#956345

After a spice session has been migrated, we don't retest the network
(user experience considerations). Instead, we obtain the is_low_bandwidth flag
from the src-server, via the migration data.
Before this patch, if we migrated from server s1 to s2 and then to s3,
and if the connection to s1 was a low bandwidth one, we erroneously
passed is_low_bandwidth=FALSE from s2 to s3.

Cc: Marc-André Lureau <a6f2b960a4aca61381fc650a67901b2ac8e83e6d@redhat.com>

Fantu/spice,alon/spice-server,SPICE/spice,Fantu/spice,freedesktop-unofficial-mirror/spice__spice,SPICE/spice,elmarco/spice,ya-mouse/spice,Fantu/spice,fgouget/spice,freedesktop-unofficial-mirror/spice__spice,Fantu/spice,fgouget/spice,ya-mouse/spice,fgouget/spice,alon/spice-server,alon/spice-server,elmarco/spice,SPICE/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,fgouget/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,elmarco/spice,alon/spice-server,elmarco/spice,ya-mouse/spice,freedesktop-unofficial-mirror/spice__spice