[backend] support architecture or package container specific constraints
[backend] first dispatch constraint tests and fix for overwrite code
[backend] fix _constraints loading also via package links
[backend] numerate test cases for constraints
[backend] add sandbox and hostlabel constraints tests
[dist] fix dispatcher test case call
[backend] become SLE 11 compatible
[backend] suppress perl warning
[backend] tweak list2struct so that it clears all old attributes

This should be in line with the user's expectations.
[backend] fix prjconf parsing for test cases
[backend] add testcase to show that package constraints win over prjconf constraints
[backend] initial support to write CPE ids to /etc/os-release, /etc/products.d/ and kiwi files.
[backend] write cpeid to suse tags for mediastyle suse-sle12 and suse-13 and higher
[backend] schedule a deepcheck retry event if getprojpack fails
[backend] support supportstatus data flow from channel to patchinfo into published repo
[api] support autocleanup of projects. Can be enable globaly for ~:branches: projects.

Opt-in and Opt-out per project is possibly by adding or removing the OBS:AutoCleanup attribute