Use dpkg-query which is available on all systems
Use dpkg-query which is available on all systems

dpkg-parsechangelog is a developer tool and depends on a full set
of developer packages. Switch to dpkg-query which is part of
dpkg itself.

Change-Id: I94e14f0906ccd33756abcaedb1173046678ceb62

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server