Fix for arch specific netboot configuration

In a0635104d537ec539bf2fcf69f24f4f1c3ce3cd0, netboot configuration
routine, configure_all() was fixed to be called with the distro tree
arch and not the system supported archs.

Bug: 1165489
Change-Id: I3d399485288b3e03fc9a1a1d67d37eb5fc761336
combine db migration 1c10e575800c into 3fc28d7eb6d3

... to avoid two sets of ALTER TABLE statements on the log_* tables.

Bug: 1163540
Change-Id: Ieec8014ab397206c649eef12271ecbdc4b2f2385
update release notes for 19.0 with some last minute bugs
Automatic commit of release 19.0
Merge tag 'beaker-19.0' into release-19