Update all packaging branches to require installation of the latest version of the checkbox stack

[Sylvain Pineau]

On Xenial, the ubuntu repos versions of checkbox packages are recent enough to satisfy the package requirements. That's not true and prevents installation from newer versions from the stable ppa.

To solve the problem we have to update all packaging branch and bump the minimum version required (for plainbox, -ng, the providers and checkbox-support).

Once fixed, requesting the installation of the cert provider will automatically pull the latest version from the stable ppa even on a system where we previously installed the stack from the stable ppa.

1. Checkbox-ng:
   http://bazaar.launchpad.net/~checkbox-dev/checkbox/ppa-packaging-checkbox-ng/view/head:/debian/control

   Bump both python3-checkbox-support and python3-plainbox in build-dep and binaries

2. Checkbox-converged:
   http://bazaar.launchpad.net/~checkbox-dev/checkbox/ppa-packaging-checkbox-converged/view/head:/debian/control

3. Checkbox-converged (Trusty version):

   http://bazaar.launchpad.net/~checkbox-dev/checkbox/ppa-packaging-checkbox-converged-trusty/view/head:/debian/control

4. Resource provider

   http://bazaar.launchpad.net/~checkbox-dev/checkbox/ppa-packaging-plainbox-provider-resource-generic/view/head:/debian/control

   Bump python3-plainbox in build-dep and python3-checkbox-support in binaries

5. Checkbox provider

   http://bazaar.launchpad.net/~checkbox-dev/checkbox/ppa-packaging-plainbox-provider-checkbox/view/head:/debian/control

   Bump plainbox-provider-resource-generic, python3-plainbox and python3-checkbox-support in build-dep
   Bump plainbox-provider-resource-generic, python3-checkbox-support in binaries

6. Client provider

   https://git.launchpad.net/~checkbox-dev/plainbox-provider-canonical-certification/+git/packaging-client/tree/debian/control

   Bump plainbox-provider-resource-generic and python3-plainbox in build-dep
   Bump everything in Depends:
   Bump fwts to 16.02
   Bump checkbox-ng everywhere

7. Server provider

   https://git.launchpad.net/~checkbox-dev/plainbox-provider-canonical-certification/+git/packaging-server/tree/debian/control

   Bump plainbox-provider-resource-generic and python3-plainbox in build-dep
   Add a minimum version for plainbox-provider-checkbox in Depends:
   Bump fwts to 16.02
   Bump checkbox-ng in canonical-certification-server
   Add a (= ${binary:Version}) after plainbox-provider-certification-server (again in canonical-certification-server)