[SRU trusty/linux-lts-utopic trusty/linux-lts-vivid] LP#1405807: use the correct common packages

[Andy Whitcroft]

We are meant to share the linux-tools-common and linux-cloud-tools-common
packages between _all_ kernels on a release.  This is because we can
have only one of each of these packages installed regardless of the
combination of native and HWE kernels we are using.  This is because
the common package provides the version specific binary selectors.
Currently linux-lts-utopic and linux-lts-vivid are incorrectly
producing their own common packages which collide with and remove the
linux*tools-common packages and prevent any cloud daemons from being
started.  Switch linux-lts-utopic and linux-lts-vivid to depending on
the common versions and stop producing the empty linux-lts-* versions.
This brings them into line with linux-lts-trusty in precise.

Following this email are two patches one for linux-lts-utopic and one
for linux-lts-vivid.

Proposing for SRU to trusty.

-apw