Frameworks merges with Debian

[Jonathan Riddell]

Now that bionic is out we can merge our repos with Debian again and
try to minimise the diff.  Place to start would be tier 0 and tier 1
frameworks repos

Repos will need Neon/unstable branches branched into
Neon/unstable_xenial, probably just do this en mass for all
Neon/everything branches in all Frameworks.  Then job_updater run to
do that

Then merge in Debian, check it for sanity, make sure old
Breaks/Replaces still exist, make sure new Breaks/Replaces are added
as needed with (<< ${source:Version}~ciBuild) as version, then peer
reviewed

Venga!

Jonathan