[Merge] lp:~jonas-drange/ubuntu-push/fix-1628327 into lp:ubuntu-push

[Jonas G. Drange]

The proposal to merge lp:~jonas-drange/ubuntu-push/fix-1628327 into lp:ubuntu-push has been updated.

Commit Message changed to:

* drops dead dependencies, replaces them with newer ones
* allows u-p to run without system image
* add upstart dep to avoid dep wait on s390x.

For more details, see:
https://code.launchpad.net/~jonas-drange/ubuntu-push/fix-1628327/+merge/307159
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