In order to make it easier to differentiate between the lists of
python packages, distribution packages, downloaded packages,
package pins and other similar variables the variable names are
being changed to ensure that they have a more explicit suffix
that defines the purpose and makes the naming more consistent.
This is to facilitate a lookup plugin which will be able to look
up all the package lists and present them as a consolidated piece
of data which may be used for artifact preparation.
Change-Id: I85fe0d5f4235c5d71ff1e8fc4066a9d1e0932684
Debian-specific vars and logic have been moved to tasks
that will execute only on those distributions.
Change-Id: I6a9d04382b1f1badebf12483ce7d1d02b43f8903
Implements: blueprint multi-platform-host
